1. Stochastic comparisons of parallel systems of heterogeneous exponential components;Dykstra;J. Statist. Plann. Inference,1997
2. Total Positivity;Karlin,1968
3. Some new results on stochastic comparisons of parallel systems;Khaledi;J. Appl. Probab.,2000
4. Comparison Methods for Stochastic Models and Risks;Müller,2002
5. Stochastic Orders;Shaked,2007