@article{TAC_2021_37_a18,
     author = {Philippe Gaucher},
     title = {Left properness of flows},
     journal = {Theory and applications of categories},
     pages = {562--612},
     publisher = {mathdoc},
     volume = {37},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2021_37_a18/}
}