Gajewski, Marcin, and Renata Horodecka. “Rheological Properties of Road Bitumens Modified by Natural Asphalt”. Roads and Bridges - Drogi i Mosty 17, no. 2 (June 30, 2018): 93–109. Accessed November 21, 2024. https://rabdim.pl/index.php/rb/article/view/v17n2p93.