Voir la notice de l'article provenant de la source Novi sad journal of mathematics website
@article{NSJOM_2003_33_1a_8, author = {Lj. Petkovi\'c and M. Petkovi\'c and D. \v{Z}ivkovi\'c}, title = {Hansen-Ptrick's family is of {Laguerre's} type}, journal = {Novi Sad Journal of Mathematics}, pages = {109-115}, publisher = {mathdoc}, volume = {33}, number = {1}, year = {2003}, url = {http://geodesic.mathdoc.fr/item/NSJOM_2003_33_1a_8/} }
Lj. Petković; M. Petković; D. Živković. Hansen-Ptrick's family is of Laguerre's type. Novi Sad Journal of Mathematics, Tome 33 (2003) no. 1. http://geodesic.mathdoc.fr/item/NSJOM_2003_33_1a_8/