A lemma of Stark.
Quadratic forms and biquadratic reciprocity.
Diophantine eaquations of the form ax2 + Db2 = yp.
Diophantine equations of the form x2 + D = yn.
The diophantine equation x2 + 3 = 7n.
Representations of discriminantal divisors by binary quadratic forms.
Class numbers of imaginary qudratic fields having exactly three discriminantal divisors.
The 2-class group of certain biquadratic number fields.
Some euclidean properties for real quadratic fields
Corrections to the paper "Quasiperfect numbers"
Quasiperfect numbers
Circularity of graphs and continua: topology
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