Daniel, Christian (2016):
Learning Hierarchical Policies from Human Feedback.
Darmstadt, Technische Universität Darmstadt,
[Ph.D. Thesis]

Daniel, Christian ; Hoof, Herke van ; Peters, Jan ; Neumann, Gerhard (2016):
Probabilistic Inference for Determining Options in Reinforcement Learning.
In: Machine Learning, 104 (2-3), pp. 337-357. [Article]