Klanfar M, Herceg V, Kuhinek D, Sekulić K. Construction and testing of the measurement system for excavator productivity. Rud.-geol.-naft. zb. [Internet]. 2019Jan.15 [cited 2024Apr.19];34(2). Available from: https://hrcak.srce.hr/ojs/index.php/rgn/article/view/7446