Standard specifications for transportation materials and methods of sampling and testing and AASHTO provisional standards, 2011 edition. 31st ed. [Washington, D.C.]: American Association of State Highway and Transportation Officials, ©2011. ISBN 9781560515111. Dostupné také z: https://proxy.k.utb.cz/login?url=http://app.knovel.com/hotlink/toc/id:kpSSTMMS13/standard_specifications_for_transportation_materials_and_methods_of_sampling_and_testing_31st_edition_and_aashto_provisional_standards_2011_edition.