Dry unit weight of compacted soils prediction using GMDH-type neural network Mahmoud Hassanlourad, Alireza Ardakani, Afshin Kordnaeij and Hossein Mola-Abasi Eur. Phys. J. Plus, 132 8 (2017) 357 Published online: 21 August 2017 DOI: 10.1140/epjp/i2017-11623-5