TY - JOUR AU - L. Mordell TI - The Diophantine equation $x^4 + y^4 = 1$ in algebraic number fields JO - Acta Arithmetica PY - 1968 SP - 347 EP - 355 VL - 14 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/aa-14-4-347-355/ DO - 10.4064/aa-14-4-347-355 LA - en ID - 10_4064_aa_14_4_347_355 ER -