A maintenance policy for a system with multi-state components: an approximate solution. - Ülkü Gürler; Alev Kaya (Reliab. Eng. Syst. Saf., 2002)

Improving Asset Management and Order Fulfillment at Deere & Company's C&CE Division. - Loren Troyer; James Smith; Sean Marshall; Elan Yaniv; Sridhar R. Tayur; Martin Barkman; Alev Kaya; Yong Liu (Interfaces, 2005)