@article{GDZPPN002220970, title = {Fields with Two Incomparable Henselian Valuation Rings.}, journal = {Manuscripta mathematica}, volume = {22}, year = {1977}, pages = {373-386}, zbl = {0384.12011}, url = {http://dml.mathdoc.fr/item/GDZPPN002220970} }
Engler, Antonio J. Fields with Two Incomparable Henselian Valuation Rings.. Manuscripta mathematica, Tome 22 (1977) pp. 373-386. http://gdmltest.u-ga.fr/item/GDZPPN002220970/