@article{2502,
author = {Pan, T.K.},
title = {Conformal correspondence of surfaces with conservation of angular spreads},
journal = {Portugaliae mathematica},
volume = {25},
year = {1966},
pages = {205-210},
zbl = {0183.25802},
mrnumber = {0234363},
language = {en},
url = {http://dml.mathdoc.fr/item/2502}
}
Pan, T.K. Conformal correspondence of surfaces with conservation of angular spreads. Portugaliae mathematica, Tome 25 (1966) pp. 205-210. http://gdmltest.u-ga.fr/item/2502/