@article{JIS_2002__5_1_a4,
     author = {Nemba,  Robert M. and Emadak,  Alphonse},
     title = {Direct enumeration of chiral and achiral graphs of a polyheterosubstituted monocyclic cycloalkane},
     journal = {Journal of integer sequences},
     year = {2002},
     volume = {5},
     number = {1},
     zbl = {1012.05089},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2002__5_1_a4/}
}