@article{JGG_2024_28_2_JGG_2024_28_2_a0,
     author = {H. Stachel},
     title = {Canal {Surfaces} {Containing} {Four} {Straight} {Lines}},
     journal = {Journal for geometry and graphics},
     pages = {137--154},
     year = {2024},
     volume = {28},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/JGG_2024_28_2_JGG_2024_28_2_a0/}
}