@article{1028989872, author = {Titus, C. J.}, title = {A projection operator on harmonic mappings.}, journal = {Michigan Math. J.}, volume = {2}, number = {1}, year = {1953}, pages = { 91-94}, language = {en}, url = {http://dml.mathdoc.fr/item/1028989872} }
Titus, C. J. A projection operator on harmonic mappings.. Michigan Math. J., Tome 2 (1953) no. 1, pp. 91-94. http://gdmltest.u-ga.fr/item/1028989872/