TY  - BOOK
AU  - Parsons, D. H.
TI  - The extension of Darboux's method
T3  - Mémorial des sciences mathématiques
PY  - 1960
IS  - 142
PB  - Gauthier-Villars
UR  - http://www.numdam.org/item/MSM_1960__142__1_0/
UR  - https://zbmath.org/?q=an%3A0119.07901
UR  - https://www.ams.org/mathscinet-getitem?mr=124604
LA  - en
ID  - MSM_1960__142__1_0
ER  -