%0 Journal Article %A Paul Ponomarev %T Class number formulas for quaternary quadratic forms %J Acta Arithmetica %D 1981 %P 95-104 %V 39 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-39-1-95-104/ %R 10.4064/aa-39-1-95-104 %G en %F 10_4064_aa_39_1_95_104