• Identity theft and societal acceptability of electronic identity in Europe and in the United States – survey questionnaireTiits, Marek; Kalvet, Tarmo2022 https://www.ibs.ee/publikatsioonid/identity-theft-and-societal-acceptability-of-electronic-identity-in-europe-and-in-the-united-states/
• Made in EstoniaTiits, Marek; Kattel, Rainer; Kalvet, Tarmo2006 https://www.ester.ee/record=b2088073*est
• Understanding the demand for retail sustainable finance in EstoniaJurkov, Kirill; Kalvet, Tarmo; Tiits, Marek; Pihelgas, Maris2025 https://doi.org/10.23657/s1d1-gm47 https://www.ibs.ee/en/publications/understanding-the-demand-for-retail-sustainable-finance-in-estonia/