@article{droguett_mosleh_2007,  title={Time to failure assessment of products at service conditions from accelerated lifetime tests with stress-dependent spread in life},  volume={27},  ISSN={0101-7438},  url={https://doi.org/10.1590/S0101-74382007000200002},  DOI={10.1590/S0101-74382007000200002},  number={2},  journal={Pesquisa Operacional},  publisher={Sociedade Brasileira de Pesquisa Operacional},  author={Droguett, Enrique López and Mosleh, Ali},  year={2007},  month={May},  pages={209–233} }