TY  - JOUR
AU  - F. Aicardi
AU  - V. A. Timorin
TI  - On Binary Quadratic Forms with the Semigroup Property
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 2007
SP  - 28
EP  - 48
VL  - 258
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TM_2007_258_a3/
LA  - en
ID  - TM_2007_258_a3
ER  -