What is BIM? A Need for A Unique BIM DefinitionDat Tien Doan, Ali Ghaffarianhoseini, Nicola Naismith, Tongrui Zhang, Attiq Ur Rehman, John Tookey and Amirhosein GhaffarianhoseiniMATEC Web Conf., 266 (2019) 05005DOI: https://doi.org/10.1051/matecconf/201926605005