@article{1183416760,
author = {Pell, Alexander},
title = {Concerning surfaces whose first and second fundamental forms are the second and first fundamental forms respectively of another surface},
journal = {Bull. Amer. Math. Soc.},
volume = {8},
number = {3},
year = {1901},
pages = { 27-28},
language = {en},
url = {http://dml.mathdoc.fr/item/1183416760}
}
Pell, Alexander. Concerning surfaces whose first and second fundamental forms are the second and first fundamental forms respectively of another surface. Bull. Amer. Math. Soc., Tome 8 (1901) no. 3, pp. 27-28. http://gdmltest.u-ga.fr/item/1183416760/