@incollection{MEM_2022_50_a0,
     author = {Kenderov, Petar},
     title = {Seventieth {Anniversary} of {Professor} {Vesselin} {Stoyanov} {Drensky}},
     booktitle = {},
     series = {Mathematics and Education in Mathematics},
     pages = {23--31},
     year = {2022},
     volume = {50},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MEM_2022_50_a0/}
}