NAZLIGÜL, Hüseyin, et al. “INVESTIGATION OF THE EFFECT OF DUST AND DIRT ACCUMULATION ON THE ELECTRICAL PERFORMANCE OF SOLAR PV PANELS”. Taikomieji Tyrimai Studijose Ir Praktikoje - Applied Research in Studies and Practice, vol. 17, no. 1, Dec. 2021, pp. 41-47, https://ojs.panko.lt/index.php/ARSP/article/view/143.