Costea, M., és G. Ciortea. „Land Use, Morphometric Conditions and Land Degradation through Erosion in Southern Transylvania : Case Study : Câlnic River Basin”. Review on Agriculture and Rural Development, köt. 1, sz. 1. suppl., 2012. január, o. 148-53, https://iskolakultura.hu/index.php/rard/article/view/13196.