@article{AFST_2018_6_27_4_777_0,
     author = {Harvey, F. Reese and Lawson, H. Blaine},
     title = {Tangents to subsolutions: existence and uniqueness, {Part~I}},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {777--848},
     publisher = {Universit\'e Paul Sabatier, Toulouse},
     volume = {Ser. 6, 27},
     number = {4},
     year = {2018},
     doi = {10.5802/afst.1583},
     zbl = {1412.35140},
     mrnumber = {3884610},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/afst.1583/}
}