TY  - JOUR
AU  - Beyer, W. A.
TI  - Inner product-magnitude-preserving transformations in complex Hilbert spaces
JO  - Compositio Mathematica
PY  - 1969
SP  - 137
EP  - 142
VL  - 21
IS  - 2
PB  - Wolters-Noordhoff Publishing
UR  - http://archive.numdam.org/item/CM_1969__21_2_137_0/
LA  - en
ID  - CM_1969__21_2_137_0
ER  -