Robuta

https://ems.press/journals/jems/articles/14298128 Birational involutions of the real projective plane | EMS Press Ivan Cheltsov, Frédéric Mangolte, Egor Yasinsky, Susanna Zimmermann real projective plane of the ems press birational involutions https://eudml.org/doc/223132 EuDML | Nielsen type numbers of self-maps on the real projective plane. on the real projective plane nielsen type numbers