Fuel economy comparisons of series, parallel and HMT hydraulic hybrid architectures. - Zhekang Du; Kai Loon Cheong; Perry Y. Li; Thomas R. Chase (ACC, 2013)

Hierarchical control strategy for a hybrid hydro-mechanical transmission (HMT) power-train. - Kai Loon Cheong; Zhekang Du; Perry Y. Li; Thomas R. Chase (ACC, 2014)

Energy management strategy for a power-split hydraulic hybrid vehicle based on Lagrange multiplier and its modifications. - Zhekang Du; Kai Loon Cheong; Perry Y. Li (J. Syst. Control. Eng., 2019)