Marinov K, Peev D. REGRESSION MODELS FOR DETERMINING THE OPERATING COSTS OF FORESTRY MILLING MACHINES FOR COMPLETE SOIL PREPARATION FOR REFORESTATION OF POPLAR CLEARINGS. INNO. 2026;13(1). Accessed May 31, 2026. https://innojs.ltu.bg/index.php/scjournal-inno/article/view/303