[18] G. Baladi and T. Dawson, Session, Pavement subgrade MR design values for Michigan´s seasonal changes, Final Report No RC-1531, Michigan State University, East Lansing, Michigan, 2009, p. 105. [En línea]. Disponible en: https://rosap.ntl.bts.gov/view/dot/18186/dot_18186_DS1.pdf?