@article{NCD_2011_18_1_a5,
     author = {Lozanka Peycheva and Grigor Har. Grigorov},
     title = {How to {Digitalize} the {Folk} {Song} {Archives?}},
     journal = {Review of the National Center for Digitization},
     pages = {42 - 58},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {2011},
     url = {http://geodesic.mathdoc.fr/item/NCD_2011_18_1_a5/}
}