@article{JEMS_2018_20_5_a5,
     author = {Robert Haslhofer and Aaron Naber},
     title = {Characterizations of the {Ricci} flow},
     journal = {Journal of the European Mathematical Society},
     pages = {1269--1302},
     publisher = {mathdoc},
     volume = {20},
     number = {5},
     year = {2018},
     doi = {10.4171/jems/787},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/787/}
}