Sakalauskas, Kazys, and Skirmantas Skrinskas. “Lithuanian Gravel Roads and Feasibility of Their paving/Lietuvos žvyrkeliai Ir Jų Asfaltavimo Tikslingumas”. Journal of Civil Engineering and Management 4, no. 2 (June 30, 1998): 134-142. Accessed December 3, 2021. https://journals.vgtu.lt/index.php/JCEM/article/view/9412.