Raab, Christiane, and Manfred Norbert Partl. “Investigation into a Long-Term Interlayer Bonding of Asphalt Pavements”. The Baltic Journal of Road and Bridge Engineering, vol. 3, no. 2, June 2008, pp. 65-70, https://doi.org/10.3846/1822-427X.2008.3.65-70.