@article{SMJ2_2006_32_4_a6,
     author = {Rusev, P.},
     title = {Selected {Papers,} {I,} {II} by {Nikola} {Obrechkoff}},
     journal = {Serdica Mathematical Journal},
     pages = {379--382},
     publisher = {mathdoc},
     volume = {32},
     number = {4},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_2006_32_4_a6/}
}