@article{Brezin:1978:PD,
author = {Br{\'e}zin, E. and Itzykson, C. and Parisi, G. and Zuber, J.
B.},
title = {Planar diagrams},
journal = {Comm. Math. Phys.},
fjournal = {Communications in Mathematical Physics},
volume = {59},
year = {1978},
number = {1},
pages = {35–51},
issn = {0010-3616},
mrclass = {81.05},
mrnumber = {MR0471676 (57 \#11401)},
mrreviewer = {C. S. Sharma},
doi = {10.1007/BF01614153},
zblno = {0997.81548}}