TY  - JOUR
AU  - Bullen, P. S.
TI  - A New Proof of an Inequality of Heinz
JO  - Canadian mathematical bulletin
PY  - 1964
SP  - 97
EP  - 100
VL  - 7
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1964-012-x/
DO  - 10.4153/CMB-1964-012-x
ID  - 10_4153_CMB_1964_012_x
ER  -