García-Rodríguez, M.; Gómez Heras, M.; Álvarez de Buergo, M.; Fort, R.; Aroztegui, J. Polygonal cracking associated to vertical and subvertical fracture surfaces in granite (La Pedriza del Manzanares, Spain): considerations for a morphological classification. JIGE 2015, 41 ,3, 365-386. https://doi.org/10.5209/rev_JIGE.2015.v41.n3.48860.