@article{Tang2018, author = "W. Tang and H. He and W.J. Wang and D.G. Chen", title = "{Untangle the structural and random zeros in statistical modelings}", year = "2018", month = "5", url = "https://tandf.figshare.com/articles/journal_contribution/Untangle_the_structural_and_random_zeros_in_statistical_modelings/5536669", doi = "10.6084/m9.figshare.5536669.v1" }