TY - JOUR AU - Tzanakis, Nikos TI - On the diophantine equation $x^2 — Dy^4 = k$ JO - Acta Arithmetica PY - 1986 VL - 46 IS - 3 SP - 257 EP - 269 LA - eng KW - quartic diophantine equation; ; semi-real biquadratic form; rational integer coefficients; p-adic method UR - http://eudml.org/doc/206002 ER -