@article{10_4064_fm_140_2_121_136,
     author = {Jerzy Jezierski},
     title = {The coincidence {Nielsen} number for maps into real projective spaces},
     journal = {Fundamenta Mathematicae},
     pages = {121--136},
     publisher = {mathdoc},
     volume = {140},
     number = {2},
     year = {1991},
     doi = {10.4064/fm-140-2-121-136},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-140-2-121-136/}
}