@article{SIGMA_2013_9_a19,
     author = {Mirta M. Castro and F. Alberto Gr\"unbaum},
     title = {On {a~Seminal} {Paper} by {Karlin} and {McGregor}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2013},
     volume = {9},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2013_9_a19/}
}