%0 Journal Article
%A Elkies, Noam D.
%T The automorphism group of the modular curve $X_0(63)$
%J Compositio Mathematica
%D 1990
%P 203-208
%V 74
%N 2
%I Kluwer Academic Publishers
%U http://www.numdam.org/item/CM_1990__74_2_203_0/
%G en
%F CM_1990__74_2_203_0