Petrografski izcledvanija vărhu surovinite za neolitni kamenni orădija (ot fonda na Arheologičeski muzej, Plovdiv). (Petrographic studies on the raw materials for Neolithic stone implements (From the fund of the Archaeological museum, Plovdiv) - Dermendžiev, Stanil (Godišnik na Archeologičeski Muzej Plovdiv, 9 (2002), 2002)