@article{MZ_1992__211_3_174462,
     author = {Trygve Johnsen},
     title = {Eight-secant conics for space curves.},
     journal = {Mathematische Zeitschrift},
     pages = {609--626},
     publisher = {mathdoc},
     volume = {211},
     number = {3},
     year = {1992},
     zbl = {0759.14042},
     url = {http://geodesic.mathdoc.fr/item/MZ_1992__211_3_174462/}
}