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