@article{VMJ_2019_21_4_a5,
     author = {A. G. Kusraev and S. S. Kutateladze},
     title = {The {Gordon} theorem: origins and meaning},
     journal = {Vladikavkazskij matemati\v{c}eskij \v{z}urnal},
     pages = {63--70},
     year = {2019},
     volume = {21},
     number = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/VMJ_2019_21_4_a5/}
}