%0 Journal Article %A András Biró %A Kostadinka Lapkova %T The class number one problem for the real quadratic fields $\mathbb {Q}(\sqrt {(an)^2+4a})$ %J Acta Arithmetica %D 2016 %P 117-131 %V 172 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa7957-12-2015/ %R 10.4064/aa7957-12-2015 %G en %F 10_4064_aa7957_12_2015