String Quartet TILEV of the Bulgarian Radio – Georgi Tilev Violin – Svetoslav Marinov Violin – Ognyan Stanchzev Viola – Joncho Bairov Violoncello
ORPHEUS String Quartet of the Plovdiv State Philharmonic Vasil Valchev Violin – Svetoslav Marinov Violin – Ognyan Stanchev Viola – Todor Valchev Violoncello
Georgi Tilev Violin/Svetoslav Marinov Violin Rundfunkorchester – Dirigent Kamen Goleminov