@article{10_5427_jsing_2020_21o,
     author = {Junki Tanaka and Toru Ohmoto},
     title = {Geometric algebra and singularities of ruled and developable surfaces},
     journal = {Journal of Singularities},
     pages = {249--267},
     publisher = {mathdoc},
     volume = {21},
     year = {2020},
     doi = {10.5427/jsing.2020.21o},
     url = {http://geodesic.mathdoc.fr/articles/10.5427/jsing.2020.21o/}
}