A historical analysis on interoperability in Estonian data exchange architecture : perspectives from the past and for the futureJackson, Eric Blake; Dreyling III, Richard Michael; Pappel, IngridICEGOV '21: Proceedings of the 14th International Conference on Theory and Practice of Electronic Governance2021 / p. 111-116 https://doi.org/10.1145/3494193.3494209 Conference Proceedings at Scopus Article at Scopus Article at WOS