%0 Journal Article %A A. Schinzel %T Hasse's principle for systems of ternary quadratic forms and for one biquadratic form %J Studia Mathematica %D 1983 %P 103-109 %V 77 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-77-2-103-109/ %R 10.4064/sm-77-2-103-109 %G en %F 10_4064_sm_77_2_103_109