Hengbo Li Liman Yang Yunhua Li Nan Yao Yuan Ye Energy-loss mechanism and load capacity analysis of slipper pair in an aerial axial piston pump. 396-400 2015 AIM https://doi.org/10.1109/AIM.2015.7222564 conf/aimech/2015 db/conf/aimech/aim2015.html#LiYLYY15