Minnaja is a member of the International Academy of Sciences San Marino and a former vice president.

He has also lectured in several European universities, and was author or coauthor of fifty scientific papers.

In 1960, Minnaja became a member of the Board of the World Esperanto Youth Organization, addressing specialized sections and services.

[4] He is still very active in the fields of esperantology and Esperanto literature, and is a member of the literary circle Patrol.

Following a brief list of Carlo Minnaja's books, some others can be found in his Padua University account page.