Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts
@article{NM_2006_LI_3-4_a5, author = {Milorad Belji\'c}, title = {Kosinusna teorema za tetraedar}, journal = {Nastava matematike}, pages = {40 }, publisher = {mathdoc}, volume = {LI}, number = {3-4}, year = {2006}, language = {en}, url = {http://geodesic.mathdoc.fr/item/NM_2006_LI_3-4_a5/} }
Milorad Beljić. Kosinusna teorema za tetraedar. Nastava matematike, LI (2006) no. 3-4, p. 40 . http://geodesic.mathdoc.fr/item/NM_2006_LI_3-4_a5/