@article{10_4153_CMB_1971_091_1,
     author = {Hartfiel, D. J. and Crosby, J. W.},
     title = {On the {Permanent} of a {Certain} {Class} of (0, {1)-Matrices}},
     journal = {Canadian mathematical bulletin},
     pages = {507--511},
     year = {1971},
     volume = {14},
     number = {4},
     doi = {10.4153/CMB-1971-091-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1971-091-1/}
}