@article{10_2298_PIM141129002M,
     author = {\v{Z}arko Mijajlovi\'c and Aleksandar Pejovi\'c},
     title = {Hopf {Algebra} of {Projection} {Functions}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {23 },
     publisher = {mathdoc},
     volume = {_N_S_97},
     number = {111},
     year = {2015},
     doi = {10.2298/PIM141129002M},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/PIM141129002M/}
}