Kăm văprosa za datirovkata na stăklarskata rabotilnica v Eskus pri s. Gigen, Loveška oblast. About the dating of te glass workshop in Eskuls near the village of Gigen, Lovetch district - Kovačeva, Teodora (Izvestija na Muzeite v Severozapadna Bălgarija, 24 (1996), 1996)