@article{NSJOM_2010_40_2a_12,
     author = {Stojan Bogdanovi\\'c, and \v{Z}arko Popovi\'c, and Miroslav
 \'Ciri\'c},
     title = {On {Lallement's} lemma},
     journal = {Novi Sad Journal of Mathematics},
     pages = {3-9},
     publisher = {mathdoc},
     volume = {40},
     number = {2},
     year = {2010},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2010_40_2a_12/}
}