@article{Barut:1971:NCS,
author = {Barut, A. O. and Girardello, L.},
title = {New ``coherent'' states associated with non-compact groups},
journal = {Comm. Math. Phys.},
fjournal = {Communications in Mathematical Physics},
volume = {21},
number = {1},
year = {1971},
pages = {41–55},
issn = {0010-3616},
mrclass = {81.22},
mrnumber = {MR0278632 (43 \#4362)},
mrreviewer = {R. Mirman},
zblno = {0214.38203}}