@article{MEM_2010_39_1_a29,
     author = {{\CYRV}{\cyra}{\cyrs}{\cyri}{\cyrl}{\cyre}{\cyrv}, {\CYRK}{\cyrl}{\cyri}{\cyrm}{\cyre}{\cyrn}{\cyrt}},
     title = {{\CYRE}{\cyrd}{\cyri}{\cyrn} {\cyrn}{\cyra}{\cyrch}{\cyri}{\cyrn} {\cyrz}{\cyra} {\cyrp}{\cyrr}{\cyre}{\cyrg}{\cyro}{\cyrv}{\cyro}{\cyrr} {\cyrn}{\cyra} {\cyrf}{\cyro}{\cyrr}{\cyrm}{\cyru}{\cyrl}{\cyri}{\cyrt}{\cyre} {\cyrp}{\cyro} {\cyrt}{\cyrr}{\cyri}{\cyrg}{\cyro}{\cyrn}{\cyro}{\cyrm}{\cyre}{\cyrt}{\cyrr}{\cyri}{\cyrya} {\cyrv} {\cyrs}{\cyrr}{\cyre}{\cyrd}{\cyrn}{\cyro}{\cyrt}{\cyro} {\cyru}{\cyrch}{\cyri}{\cyrl}{\cyri}{\cyrshch}{\cyre}},
     journal = {Mathematics and Education in Mathematics},
     pages = {262--267},
     publisher = {mathdoc},
     volume = {39},
     number = {1},
     year = {2010},
     language = {bg},
     url = {http://geodesic.mathdoc.fr/item/MEM_2010_39_1_a29/}
}