Monitoring multiple information systems. - Ognjen Orel; Boris Matijasevic; Hrvoje Roncevic (ITI, 2008)

Otkrivanje moguće zlouporabe u informacijskim sustavima temeljeno na odstupanjima u vremenskim grafovima ; Detection of potential misuse in information systems based on temporal graph anomalies. - Ognjen Orel (2017)

Adapting CERIF for a national CRIS: A case study. - D. Kremenjas; Petra Udovicic; Ognjen Orel (MIPRO, 2020)

In-database Auditing Subsystem for Security Enhancement. - Bjanka Basic; Petra Udovicic; Ognjen Orel (MIPRO, 2021)

A Multi-Purpose Shallow Convolutional Neural Network for Chart Images. - Filip Bajic; Ognjen Orel; Marija Habijan (Sensors, 2022)

Virtual Campus as a Core Information Infrastructure of the European University. - Ognjen Orel; Alen Novosel (EUNIS, 2023)

The role of CRIS as a glue for national e-infrastructure and digital services for open science. - Petra Udovicic; Mia Matijasevic; Lucija Vusic; Marin Hanic; Neven Balenovic; Ognjen Orel (CRIS, 2024)

Connecting Dots... The Significance of the LMS-SMS Connection in Virtual Learning Environment. - Zvonko Martinovic; Alen Novosel; Sandra Kucina Softic; Ognjen Orel (MIPRO, 2024)