@article{ZR_1953_Knj_3_1_a19,
     author = {Branislav Petonijevi\'c},
     title = {Application des {Fonctions} {Hyperboliques} {\`A} la {R\'eduction} des {Formules} {Trigonom\'etriques} du {Triangle} {Rectangle} {Dans} le {Plan} de {Lobatschewsky}},
     journal = {Zbornik radova},
     pages = {289 - 299},
     publisher = {mathdoc},
     volume = {Knj. 3},
     number = {1},
     year = {1953},
     url = {http://geodesic.mathdoc.fr/item/ZR_1953_Knj_3_1_a19/}
}