@article{MEM_2020_49_a5,
     author = {Baicheva, Tsonka and Boyvalenkov, Peter and Bouyukliev, Iliya},
     title = {Stefan {Dodunekov{\textquoteright}s} 75th birthday},
     journal = {Mathematics and Education in Mathematics},
     pages = {48--57},
     publisher = {mathdoc},
     volume = {49},
     year = {2020},
     language = {bg},
     url = {http://geodesic.mathdoc.fr/item/MEM_2020_49_a5/}
}