@article {1811.03611, archivePrefix = {arXiv}, eprint = {1811.03611}, primaryClass = {astro-ph.SR}, author = {P. F. Rohde and S. Walch and D. Seifried and A. P. Whitworth and S. D. Clarke}, title = {Evolution of Hubble wedges in episodic protostellar outflows}, year = {2018}, url = {http://arxiv.org/abs/1811.03611} }