@article{MM_2001_13_6_a18,
     author = {V. I. Kireev and G. V. Tsirkov},
     title = {Implicit square formulas},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {117--123},
     publisher = {mathdoc},
     volume = {13},
     number = {6},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_2001_13_6_a18/}
}