@article{1178245480,
author = {Sagawa, Akira},
title = {A note on a Riemann surface with null boundary},
journal = {Tohoku Math. J. (2)},
volume = {3},
number = {3},
year = {1951},
pages = { 273-276},
language = {en},
url = {http://dml.mathdoc.fr/item/1178245480}
}
Sagawa, Akira. A note on a Riemann surface with null boundary. Tohoku Math. J. (2), Tome 3 (1951) no. 3, pp. 273-276. http://gdmltest.u-ga.fr/item/1178245480/