InStory: a system for mobile information access, storytelling and gaming activities in physical spaces. - Nuno Correia 001; Luís Alves; Helder Correia; Luís Romero; Carmen Morgado; Luís Soares; José C. Cunha; Teresa Romão; A. Eduardo Dias; Joaquim A. Jorge (Advances in Computer Entertainment Technology, 2005)

Eshu: An Extensible Web Editor for Diagrammatic Languages. - José Paulo Leal; Helder Correia; José Carlos Paiva (SLATE, 2016)

Enhancing Feedback to Students in Automated Diagram Assessment. - Helder Correia; José Paulo Leal; José Carlos Paiva (SLATE, 2017)

Improving Diagram Assessment in Mooshak. - Helder Correia; José Paulo Leal; José Carlos Paiva (TEA, 2017)

Moozz: Assessment of Quizzes in Mooshak 2.0 (Short Paper). - Helder Correia; José Paulo Leal; José Carlos Paiva (SLATE, 2018)

Relationship Between Operational, Economic, and Financial Efficiencies and User Satisfaction at the Health Centers of Praia City. - Helder Correia; Jorge Manuel Afonso Alves; Clara B. Vaz (ICCSA (Workshops 3), 2025)