@article{10_4153_CJM_1973_077_1,
     author = {Little, Charles H. C.},
     title = {Kasteleyn's {Theorem} and {Arbitrary} {Graphs}},
     journal = {Canadian journal of mathematics},
     pages = {758--764},
     year = {1973},
     volume = {25},
     number = {4},
     doi = {10.4153/CJM-1973-077-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1973-077-1/}
}