@article{MM2_1989__63_3_155386,
     author = {Rolf Walter},
     title = {Constant {Mean} {Curvature} {Tori} with spherical curvature lines in noneuclidean geometry.},
     journal = {Manuscripta mathematica},
     pages = {343--364},
     publisher = {mathdoc},
     volume = {63},
     number = {3},
     year = {1989},
     zbl = {0679.53006},
     url = {http://geodesic.mathdoc.fr/item/MM2_1989__63_3_155386/}
}