@article{GDZPPN002199459,
title = {The least square-free number in an arithmetic progression.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {334},
year = {1982},
pages = {204-220},
zbl = {0493.10045},
url = {http://dml.mathdoc.fr/item/GDZPPN002199459}
}
Heath-Brown, D.R. The least square-free number in an arithmetic progression.. Journal für die reine und angewandte Mathematik, Tome 334 (1982) pp. 204-220. http://gdmltest.u-ga.fr/item/GDZPPN002199459/