“REGRESSION MODELS FOR DETERMINING THE OPERATING COSTS OF FORESTRY MILLING MACHINES FOR COMPLETE SOIL PREPARATION FOR REFORESTATION OF POPLAR CLEARINGS” (2026) Innovation in Woodworking Industry and Engineering design, 13(1). Available at: http://innojs.ltu.bg/index.php/scjournal-inno/article/view/303 (Accessed: 25 February 2026).