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@article{MS2_1992__70_1_167188, author = {B. Gustafsson and Makoto Sakai}, title = {An {Approximation} {Theorem} for {Integrable} {Harmonic} {Vector} {Fields.}}, journal = {Mathematica Scandinavica}, pages = {78--90}, publisher = {mathdoc}, volume = {70}, number = {1}, year = {1992}, zbl = {0734.31001}, url = {http://geodesic.mathdoc.fr/item/MS2_1992__70_1_167188/} }
B. Gustafsson; Makoto Sakai. An Approximation Theorem for Integrable Harmonic Vector Fields.. Mathematica Scandinavica, Tome 70 (1992) no. 1, pp. 78-90. http://geodesic.mathdoc.fr/item/MS2_1992__70_1_167188/