TY  - JOUR
AU  - M. Kenku
TI  - Atkin-Lehner involutions and class number residuality
JO  - Acta Arithmetica
PY  - 1977
SP  - 1
EP  - 9
VL  - 33
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/aa-33-1-1-9/
DO  - 10.4064/aa-33-1-1-9
LA  - en
ID  - 10_4064_aa_33_1_1_9
ER  -