Tooth flank modification theory of dual-torus double-enveloping hourglass worm drives. - Yaping Zhao; Jianyi Kong; Gongfa Li; Tianchao Wu (Comput. Aided Des., 2011)

Computerized simulation of tooth contact and error sensitivity investigation for ease-off hourglass worm drives. - Yaping Zhao; Jianyi Kong; Gongfa Li; Tianchao Wu; Shaoyang Shi (Comput. Aided Des., 2012)