@article{10_4171_dm_8,
     author = {Manfred Knebusch and Digen Zhang},
     title = {Manis valuations and {Pr\"ufer} extensions. {I}},
     journal = {Documenta mathematica},
     pages = {149--198},
     year = {1996},
     volume = {1},
     doi = {10.4171/dm/8},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/8/}
}