@article{AM2_1976__14_136597,
     author = {A.K. Dewdney},
     title = {The intersection numbers of a complex.},
     journal = {Aequationes mathematicae},
     pages = {357--362},
     year = {1976},
     volume = {14},
     zbl = {0333.05103},
     url = {http://geodesic.mathdoc.fr/item/AM2_1976__14_136597/}
}