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"Exploring and Demonstrating the Once-Only Principle: A European Perspective."
Robert Krimmer et al. (2017)
- Robert Krimmer
, Tarmo Kalvet, Maarja Toots, Aleksandrs Cepilovs
, Efthimios Tambouris
:
Exploring and Demonstrating the Once-Only Principle: A European Perspective. DG.O 2017: 546-551
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