@article{JIS_2010__13_7_a1,
     author = {Witu{\l}a, Roman},
     title = {Ramanujan cubic polynomials of the second kind},
     journal = {Journal of integer sequences},
     publisher = {mathdoc},
     volume = {13},
     number = {7},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2010__13_7_a1/}
}