@article{VVGUM_2017_20_3_a5,
     author = {A. I. Ibragimov and A. I. Nazarov},
     title = {On {Phragm\'en} --- {Lindel\"of}  principle for {Non-divergence} {Type} {Elliptic} {Equations} and  {Mixed} {Boundary} conditions},
     journal = {Matemati\v{c}eska\^a fizika i kompʹ\^uternoe modelirovanie},
     pages = {65--76},
     publisher = {mathdoc},
     volume = {20},
     number = {3},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/VVGUM_2017_20_3_a5/}
}