Geodesic
On the geodesic torsion of a tangential intersection curve of two surfaces in R3
Acta mathematica Universitatis Comenianae, Tome 82 (2013) no. 2, pp. 177-189 
M. Çalışkan; B. U. Dűldűl; M. Çalışkan; B. U. Dűldűl. On the geodesic torsion of a tangential intersection curve of two surfaces in R3. Acta mathematica Universitatis Comenianae, Tome 82 (2013) no. 2, pp. 177-189. http://geodesic.mathdoc.fr/item/AMUC_2013_82_2_a2/
@article{AMUC_2013_82_2_a2,
     author = {M. \c{C}al{\i}\c{s}kan and B. U. D\'{u}ld\'{u}l and M. \c{C}al{\i}\c{s}kan and B. U. D\'{u}ld\'{u}l},
     title = { On the geodesic torsion of a tangential intersection curve of two surfaces in {R3}},
     journal = {Acta mathematica Universitatis Comenianae},
     pages = {177--189},
     year = {2013},
     volume = {82},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/AMUC_2013_82_2_a2/}
}
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Voir la notice de l'article provenant de la source Comenius University

In this paper, we find the unit tangent vector and the geodesic torsion of the tangential intersection curve of two surfaces in all three types of surface-surface intersection problems (parametric-parametric, implicit-implicit and parametric-imp- licit) in three-dimensional Euclidean space.