@article{MEM_2022_51_a1,
     author = {Ivanov, Kamen and Petrushev, Pencho},
     title = {The legacy of {Vasil} {A.} {Popov} {\textendash} teacher, colleague and friend},
     journal = {Mathematics and Education in Mathematics},
     pages = {20--23},
     publisher = {mathdoc},
     volume = {51},
     year = {2022},
     language = {bg},
     url = {http://geodesic.mathdoc.fr/item/MEM_2022_51_a1/}
}