Quadratic Equations over Finite Fields and Class Numbers of Real Quadratic Fields.
Quadratic extensions of quintic fields of signature
Quadratic fields with infinite Hilbert 2-class field towers
Quadratic function fields whose class numbers are not divisible by three
Quadratic polynomials producing consecutive, distinct primes and class groups of complex quadratic fields
Quadratische Formen und quadratische Reziprozitätsgesetze über algebraischen Zahlkörpern.