@article{10_4064_fm204_2_3,
     author = {Grzegorz Graff and Jerzy Jezierski},
     title = {Minimal number of periodic points for
 smooth self-maps of $S^3$},
     journal = {Fundamenta Mathematicae},
     pages = {127--144},
     publisher = {mathdoc},
     volume = {204},
     number = {2},
     year = {2009},
     doi = {10.4064/fm204-2-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm204-2-3/}
}