@article{JCEM_2015_2_4_a6,
     author = {D. A. Serkov},
     title = {On approximation of joint fixed points},
     journal = {Journal of computational and engineering mathematics},
     pages = {67--72},
     year = {2015},
     volume = {2},
     number = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JCEM_2015_2_4_a6/}
}