Sulistyawati, M.N. et al. 2019. The Implementation Of Ladm Versionedobject Class For Representing Spatio-Temporal Of Cadastre 4d Objects. BHUMI: Jurnal Agraria dan Pertanahan. 4, 2 (Jan. 2019), 249–265. DOI:https://doi.org/10.31292/jb.v4i2.281.