The Russian translation of his thesis was published as a separate book in 1965 (with 1964 printed on the title page).

[5] His dissertation was published as a book in 1972 under the title Adramaa: Eesti talurahva maakasutuse ja maksustuse alused 13.–19.

sajandil (Adramaa [et]: The Foundations of Estonian Peasant Land Use and Taxation in the Thirteenth to Nineteenth Centuries).

While working at the History Institute, he served as the supervisor for several historians, including Küllike Kaplinski, Maia Madari, Raivo Palmaru, Teet Veispak, Priit Raudkivi, and Jüri Kivimäe [et].

[1] Tarvel studied topics in Estonian history from ancient times to the present day.

An important part of Tarvel's research activity was translating, editing, and annotating medieval chronicles about Old Livonia.