@article{00147582,
title = {Unordered love in infinite directed graphs.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {15},
year = {1992},
pages = {753-756},
doi = {10.1155/S0161171292000978},
zbl = {0771.05046},
language = {en},
url = {http://dml.mathdoc.fr/item/00147582}
}
Johnson, Peter D.jun. Unordered love in infinite directed graphs.. International Journal of Mathematics and Mathematical Sciences, Tome 15 (1992) pp. 753-756. doi : 10.1155/S0161171292000978. http://gdmltest.u-ga.fr/item/00147582/