TY  - JOUR
AU  - Ricardo Uribe-Vargas
TI  - On Projective Umbilics: a Geometric Invariant and an Index
JO  - Journal of Singularities
PY  - 2018
SP  - 81
EP  - 90
VL  - 17
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.5427/jsing.2018.17e/
DO  - 10.5427/jsing.2018.17e
ID  - 10_5427_jsing_2018_17e
ER  -