@article{AUM_2010_54_2_a5,
     author = {Cie\'slak, Waldemar and Szczygielska, El\.zbieta},
     title = {On {Poncelet{\textquoteright}s} porism},
     journal = {Annales Universitatis Mariae Curie-Sk{\l}odowska. Mathematica },
     publisher = {mathdoc},
     volume = {54},
     number = {2},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUM_2010_54_2_a5/}
}