@article{GDZPPN002036606, title = {The Gauss code problem off the plane.}, journal = {Aequationes mathematicae}, volume = {33}, year = {1987}, pages = {81-95}, zbl = {0591.05024}, url = {http://dml.mathdoc.fr/item/GDZPPN002036606} }
Lins, S.; Richter, B.; Shank, H. The Gauss code problem off the plane.. Aequationes mathematicae, Tome 33 (1987) pp. 81-95. http://gdmltest.u-ga.fr/item/GDZPPN002036606/