@article{GDZPPN002335964,
title = {Elliptic surfaces with four singular fibres.},
journal = {Mathematische Annalen},
volume = {291},
year = {1991},
pages = {319-342},
zbl = {0762.14018},
url = {http://dml.mathdoc.fr/item/GDZPPN002335964}
}
Herfurtner, Stephan. Elliptic surfaces with four singular fibres.. Mathematische Annalen, Tome 291 (1991) pp. 319-342. http://gdmltest.u-ga.fr/item/GDZPPN002335964/