TY  - JOUR
AU  - Quintas, Louis V.
AU  - Supnick, Fred
TI  - Extrema in Space-Time
JO  - Canadian journal of mathematics
PY  - 1966
SP  - 678
EP  - 691
VL  - 18
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1966-069-1/
DO  - 10.4153/CJM-1966-069-1
ID  - 10_4153_CJM_1966_069_1
ER  -