@article{PIM_1988_N_S_43_57_a16,
     author = {Ioannis M. Roussos},
     title = {A {Geometric} {Characterization} of {Helicodial} {Surfaces} of {Constant} {Mean} {Curvature}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {137 - 142},
     publisher = {mathdoc},
     volume = {(N.S.) 43},
     number = {57},
     year = {1988},
     url = {https://geodesic-test.mathdoc.fr/item/PIM_1988_N_S_43_57_a16/}
}