Wo ist denn dein Leuchten hin? Ge Guo, Gloria Oppermann, Madita Scheunemann E-Book (pdf)

Stabilization, Tracking and Formation Control of Autonomous Marine Vessels Ge Guo, Zhenyu Gao, Pengfei Zhang E-Book (pdf)

Taoist Inner Alchemy Ge Guolong, Huang Yuanji E-Book (epub)