Yahua Liu, Jinwu Wang, Jinfeng Wang, Yiyuan Ge. Optimal Design and Analysis on Pricking Hole Mechanism with Planetary Elliptic Gears for Deep-Fertilization Liquid Fertilizer Applicator. In Second International Conference on Digital Manufacturing and Automation, ICDMA 2011, Zhangjiajie, Hunan, China, August 5-7, 2011. pages 809-812, IEEE, 2011. [doi]