@article{FPM_2006_12_7_a2,
     author = {H. Baran and M. Marvan},
     title = {A~conjecture concerning nonlocal terms of recursion operators},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {23--33},
     publisher = {mathdoc},
     volume = {12},
     number = {7},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2006_12_7_a2/}
}