A quality model of metamodeling systemsSgirka, Rünno; Eessaar, ErkiEmerging trends in computing, informatics, systems sciences, and engineering2013 / p. 543-555 https://doi.org/10.1007/978-1-4614-3558-7_46 Conference Proceedings at Scopus Article at Scopus A versioning subsystem of metamodeling systemSgirka, RünnoInnovations and advances in computer, information, systems sciences, and engineering2013 / p. 305-317 https://doi.org/10.1007/978-1-4614-3535-8_26 Conference Proceedings at Scopus Article at Scopus