@article{MM2_1977__23_154529,
     author = {Antonio J. Engler},
     title = {Fields with {Two} {Incomparable} {Henselian} {Valuation} {Rings.}},
     journal = {Manuscripta mathematica},
     pages = {373--386},
     publisher = {mathdoc},
     volume = {23},
     year = {1977},
     zbl = {0384.12011},
     url = {http://geodesic.mathdoc.fr/item/MM2_1977__23_154529/}
}