@article{MS2_1989__65_2_167067,
     author = {F.J.C. de Carvalho and S.A. Robertson},
     title = {Self-parallel curves.},
     journal = {Mathematica Scandinavica},
     pages = {67--74},
     publisher = {mathdoc},
     volume = {65},
     number = {2},
     year = {1989},
     zbl = {0697.53005},
     url = {http://geodesic.mathdoc.fr/item/MS2_1989__65_2_167067/}
}