Dokl. Akad. Nauk SSSR, 1968 Volume 179, Number 5,Pages 1050–1053(Mi dan33786)
MATHEMATICS
The distribution of class numbers $h$ of real quadratic fields $K(\sqrt{p})$ with prime discriminant $p\equiv1(\operatorname{mod}4)$ over residue classes $\{4k+1\}$ and $\{4k+3\}$