%0 Journal Article %A Nikos Tzanakis %T On the diophantine equation $x^2 — Dy^4 = k$ %J Acta Arithmetica %D 1985 %P 257-269 %V 46 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-46-3-257-269/ %R 10.4064/aa-46-3-257-269 %G en %F 10_4064_aa_46_3_257_269