Application of Automated Trust Verification and Delegation Mechanisms in PEPPOL eProcurement Network. - Konstantinos Douloudis; Maria Siapera; Gerasimos Dimitriou; Andriana Prentza (EMCIS, 2019)

Employing the Once-Only Principle in the Domain of the Electronic Public Procurement. - Maria Siapera; Konstantinos Douloudis; Gerasimos Dimitriou; Andriana Prentza (EMCIS, 2019)

Improving Electronic Public Procurement Using the Once-Only Principle: Connecting the Greek Electronic Single Procurement Document System to the Once-Only Principle Project's Infrastructure, Implementing the eProcurement Pilot. - Konstantinos Douloudis; Maria Siapera; Andriana Prentza (ICEGOV, 2021)

A Common Data Model for Once-Only Cross-Border Data Exchanges in Europe. - Maria Siapera; Konstantinos Douloudis; Andriana Prentza (ICEGOV, 2021)