1. Gupta, A., Pachar, N., Jain, A., Govindan, K. & Jha, P. C (2023). Resource Reallocation Strategies for Sustainable Efficiency Improvement of Retail Chains. Journal of Retailing and Consumer Services, 73, 103309 (Indexing: SCI, Scopus, Impact Factor: 10.97, Category: A, Electronic ISSN: 1873-1384, Print ISSN: 0969-6989, Cite Score 2021: 11.4).
2. Pachar, N., Darbari, J.D., Govindan, K. & Jha, P. C (2022). Sustainable Performance Measurement of Indian Retail Chain using Two-Stage Network DEA. Annals of Operations Research, 315(2), 1477-1515 (Indexing: SCI, Scopus, Impact Factor: 4.82, Category: A, Electronic ISSN: 1572-9338, Print ISSN:0254-5330, Cite Score 2020: 5.2)
3. Pachar, N., Gupta, A., & Jha, P. C. (2020). Bi-level Efficiency evaluation of Indian Electronics Retail sectors based on DEA Stackelberg Game Approach. Yugoslav Journal of Operations Research. 30(4), 461-481(Indexing: Scopus, ISSN: 0354-0243 EISSN: 2334-6043)
4. Gupta, A., Pachar, N., & Jha, P. C (2020). Centralised resource reallocation and reduction with common weight DEA model. International Journal of Business Performance and Supply Chain Modelling, 12(3), 179-203. (Indexing: Scopus, ISSN Online: 1758-941X, ISSN print: 1758-9401, CiteScore 2020: 1.3) (Corresponding Author).
5. Gupta, A., Pachar, N., Jha, P. C., & Darbari, J. D. (2019). Efficiency assessment of Indian electronics retail stores using DEA. International Journal of Business Performance and Supply Chain Modelling, 10(4), 386-414. (Indexing: Scopus, ISSN Online: 1758-941X, ISSN print: 1758-9401, CiteScore 2020: 1.3)

1. Gupta, A., Pachar, N., & Pinto, M. C. B. (2020, February). Efficiency Assessment Through Peer Evaluation and Benchmarking: A Case Study of a Retail Chain Using DEA. In Indo-French Seminar on Optimization, Variational Analysis and Applications (pp. 403-419). Springer, Singapore.
2. Pachar, N.,& Gupta, A. (2021). Centralised Resource Allocation Model for Improving the Environmental Sustainability of Retailers with Imprecise Data Envelopment Analysis. In Soft Computing for Problem Solving (pp. 603-619). Springer, Singapore. (Indexing: Scopus, AISC Series).

1. Presented a Paper entitled Integrated centralized and decentralized resource reallocation strategy based on DEA for improving sustainable performance: a case study of supermarket retail firms at International Symposium on Computational Operations Research and Algorithmic Game Theory held online during March 29-31, 2021.
2. Presented a Paper entitled Integrated DEA and goal programming approach for resource reallocation at Indo-French Seminar on Optimization, Variational Analysis & Applications (IFSOVAA-2020) organized by BHU during 02-04, February, 2020.
3. Presented a Paper entitled Sustainable Performance Measurement of Indian Retail Chain using DEA at Logistics Conclave and Conference held at IIFT Delhi during 19-20, November 2019.
4. Presented a Paper entitled Peer Assessments of Indian Electronics Retail Stores Operations at International Conference on Business and Management organized by Delhi Technological University, Delhi during 29-30 March, 2019.
5. Presented a Paper entitled Assessment and Benchmarking of Retailer’s Efficiency through DEA at International Conference on Emerging Innovations in Statistics & Operations Research organized by MDU, Rohtak during 27 – 30 December 2018.
6. Presented a Paper entitled A DEA Approach to Evaluate the Efficiency of Retailers at Fifth International Conference on the Business Analytics and Intelligence organized by Indian Institute of Management, Bangalore during 11-13, December, 2017.
7. Presented a Paper entitled an Integrated DEA model for performance Evaluation of Green retailers at the Joint International Conference on Interdisciplinary Research and 8th International Conference on Quality, Reliability, Infocom Technology and Business Operations, February 8-10, 2017, Amity University, Noida.
8. Presented a Paper entitled Fuzzy DEA model for sustainable performance evaluation of retailers at the 6th International Conference on Soft Computing for Problem Solving (SocProS 2016), December 23-24, 2016, Thapar University, Patiala.
9. Presented a Paper entitled Measuring sustainable efforts of retail stores using data envelopment analysis at 49th Annual Convention of the Operational Research Society of India & International Conference on Analytics in Operational Research, at BIMTECH, Greater Noida, India, 12-14, December, 2016.
10. Presented a Paper entitled Selection of third-party reverse logistics provider using QFDat the National Conference on Recent Trends and Development in Statistics (NCRTDS), February 21-23, 2015, M.D. University, Rohtak.

1. Attended Workshop on Python at Department of Statistics, University of Delhi during 13-17 January, 2020.
2. Attended 2017 Symposium on Mathematical Programming and Game Theory at Indian Statistical Institute Delhi Centre during 9th -11th January,2017.
3. Attended Workshop on Fuzzy and Rough Sets for Knowledge Discovery-2016 and presented poster at School of Computer and Systems Sciences (SC&SS), Jawaharlal Nehru University during 5th- 9th September 2016.
4. Attended a workshop on Applied Optimization Models and Computation held at Indian Statistical Institute Delhi Centre during 28th -30th January, 2015.
5. Attended a workshop on Information Literacy & Competency at Delhi University, Delhi on 19th February, 2014.

1. Attended Course on SWARM and Evolutionary Computation organized by Soft Computing Research Society at South Asian University, New Delhi during November 24-25, 2018.
2. Mini MTTS Programme, sponsored by NBHM, Department of Atomic Energy, Govt. of India from December 18-24, 2010 at Banasthali University.
3. Mathematics Training and Talent Search Programme (Founded by NBHM) at HRI, Allahabad, May 24-June19, 2010.