@article{CM_1986__59_1_15_0, author = {Jost, J\"urgen}, title = {On the existence of harmonic maps from a surface into the real projective plane}, journal = {Compositio Mathematica}, publisher = {Martinus Nijhoff Publishers}, volume = {59}, number = {1}, year = {1986}, pages = {15-19}, zbl = {0601.58026}, mrnumber = {850117}, language = {en}, url = {http://www.numdam.org/item/CM_1986__59_1_15_0} }

Jost, Jürgen. On the existence of harmonic maps from a surface into the real projective plane. Compositio Mathematica, Volume 59 (1986) no. 1, pp. 15-19. http://www.numdam.org/item/CM_1986__59_1_15_0/

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