Evolution of Topics and Novelty in Science. - Omar Ballester; Orion Penner (ISSI, 2019)

An Artificial Intelligence Definition and Classification Framework for Public Sector Applications. - Omar Ballester (DG.O, 2021)

Maturity Models in Information Systems: A Review and Extension of Existing Guidelines. - Tobias Mettler; Omar Ballester (ICIS, 2021)

Robustness, replicability and scalability in topic modelling. - Omar Ballester; Orion Penner (J. Informetrics, 2022)