@article{10_4064_ap103_1_7,
     author = {Antonio Iannizzotto},
     title = {Three periodic solutions for an
 ordinary differential inclusion with two parameters},
     journal = {Annales Polonici Mathematici},
     pages = {89--100},
     publisher = {mathdoc},
     volume = {103},
     number = {1},
     year = {2012},
     doi = {10.4064/ap103-1-7},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap103-1-7/}
}