@article{VUU_2012_1_a2,
     author = {G. G. Islamov},
     title = {On the question of extended convexity of {Green} operator},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {26--31},
     year = {2012},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2012_1_a2/}
}