@inproceedings{HoellerHPlan20B,
   title = {Delete- and Ordering-Relaxation Heuristics for HTN Planning},
   author = {Daniel H{\"{o}}ller and Pascal Bercher and Gregor Behnke},
   booktitle = {Proceedings of the 3rd ICAPS Workshop on Hierarchical Planning (HPlan)},
   year = {2020}
}