@article{Patel_Gajjar_2014, title={Life Test Based on Progressively Group-Censored Samples From Exponential Distribution With Periodic Change in Failure Rate}, volume={29}, url={https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/6517}, DOI={10.14429/dsj.29.6517}, number={4}, journal={Defence Science Journal}, author={Patel, I. and Gajjar, A.}, year={2014}, month={Feb.}, pages={167-172} }