@article{AM2_1981__22_136851,
     author = {J.A. Bondy and R. H\"aggkvist},
     title = {Edge-disjoint {Hamilton} cycles in 4-regular planar graphs.},
     journal = {Aequationes mathematicae},
     pages = {42--45},
     publisher = {mathdoc},
     volume = {22},
     year = {1981},
     zbl = {0464.05037},
     url = {http://geodesic.mathdoc.fr/item/AM2_1981__22_136851/}
}