@article{10_4064_fm_134_3_183_212,
     author = {Jerzy Jezierski},
     title = {The {Nielsen} product formula for coincidences},
     journal = {Fundamenta Mathematicae},
     pages = {183--212},
     publisher = {mathdoc},
     volume = {134},
     number = {3},
     year = {1990},
     doi = {10.4064/fm-134-3-183-212},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-134-3-183-212/}
}