@article{AUM_2012_66_1_a3,
     author = {Mozgawa, Witold and Skrzypiec, Magdalena},
     title = {Integral formula for secantoptics and its application},
     journal = {Annales Universitatis Mariae Curie-Sk{\l}odowska. Mathematica },
     publisher = {mathdoc},
     volume = {66},
     number = {1},
     year = {2012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUM_2012_66_1_a3/}
}