Patel ID, Gajjar AV. Life Test Based on Progressively Group-Censored Samples From Exponential Distribution With Periodic Change in Failure Rate. Def. Sc. J. [Internet]. 2014 Feb. 25 [cited 2025 Jul. 8];29(4):167-72. Available from: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/6517