@article{GDZPPN002061090, title = {Geodesics Satisfying General Boundary Conditions}, journal = {Commentarii mathematici Helvetici}, volume = {48}, year = {1973}, pages = {376-381}, zbl = {0268.53020}, url = {http://dml.mathdoc.fr/item/GDZPPN002061090} }
Grove, Karsten. Geodesics Satisfying General Boundary Conditions. Commentarii mathematici Helvetici, Tome 48 (1973) pp. 376-381. http://gdmltest.u-ga.fr/item/GDZPPN002061090/