@article{JIS_2014__17_4_a7,
     author = {Ram{\'\i}rez, Jos\'e L. and Sirvent, V{\'\i}ctor F.},
     title = {Incomplete tribonacci numbers and polynomials},
     journal = {Journal of integer sequences},
     publisher = {mathdoc},
     volume = {17},
     number = {4},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2014__17_4_a7/}
}