@article{GDZPPN002361345, title = {An Approximation Theorem for Integrable Harmonic Vector Fields.}, journal = {Mathematica Scandinavica}, volume = {70}, year = {1992}, pages = {78-90}, zbl = {0734.31001}, url = {http://dml.mathdoc.fr/item/GDZPPN002361345} }
Gustafsson, B.; Sakai, Makoto. An Approximation Theorem for Integrable Harmonic Vector Fields.. Mathematica Scandinavica, Tome 70 (1992) pp. 78-90. http://gdmltest.u-ga.fr/item/GDZPPN002361345/