On the acceleration of land subsidence rate in Semarang City as detected from GPS surveysHeri Andreas, Hasanuddin Zainal Abidin, Irwan Gumilar, Teguh Purnama Sidiq, Dina Anggreni Sarsito and Dhota PradiptaE3S Web Conf., 94 (2019) 04002DOI: https://doi.org/10.1051/e3sconf/20199404002