On optimal replacement-repair policy for multi-state deteriorating products under renewing free replacement warranty. - Hashem Vahdani; Stefanka S. Chukova; Hashem Mahlooji (Comput. Math. Appl., 2011)

Warranty servicing for discretely degrading items with non-zero repair time under renewing warranty. - Hashem Vahdani; Hashem Mahlooji; Abdolhamid Eshraghniaye Jahromi (Comput. Ind. Eng., 2013)

Technicians scheduling and routing problem for elevators preventive maintenance. - Mahsa Rastegar; Hossein Karimi; Hashem Vahdani (Expert Syst. Appl., 2024)