%0 Journal Article %A WILHELM LJUNGGREN %T On an improvement of a theorem of T. Nagell concerning the Diophantine equation Ax3 + By3 = C %J Mathematica Scandinavica %D 1953 %P 297-309 %V 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1953__1_165510/ %F MS2_1953__1_165510