Kosteni izdelija, otkriti v sgrada ot rimskata epoha v mestnostta Dana bunar (v zemliščeto na selo Georgi Dobrevo, obščina Ljubimec) : (Bone implements found in a building from Roman period in Dana Bunar locality, the territory of the village of Georgi Dobrevo, municipality of Lujbimets). - Penčeva, Elena (Universitetsko Izdatelstvo "Sv. Kliment Ohridski", 2005)