@article{GDZPPN00036326X,
title = {On Lattices with M\"obius Function $\pm$1, 0.},
journal = {Discrete \& computational geometry},
volume = {2},
year = {1987},
pages = {1-8},
url = {http://dml.mathdoc.fr/item/GDZPPN00036326X}
}
Kahn, J. On Lattices with Möbius Function ±1, 0.. Discrete & computational geometry, Tome 2 (1987) pp. 1-8. http://gdmltest.u-ga.fr/item/GDZPPN00036326X/