found: Suomen kielen sanaston historiallista taustaa, 1985:t.p. (Kaisa Häkkinen)
found: Suom. kirj., 84-10(Häkkinen, Kaisa, 1950- )
found: Suomi mlande ten︠g︡geche ... 1997:t.p. (Kaĭsa Khi︠a︡kkinen)
found: Spreading the written word, 2015:title page (Kaisa Häkkinen)
found: Wikipedia, via WWW, April 18, 2016(Kaisa Mervi Maritta Häkkinen; born November 17, 1950 in Kouvola; Finnish professor and linguist; she has worked with the University of Turku Faculty of Arts and taught Finnish language and history of the language of the municipality; in August 2015 Häkkinen retired as the Finnish language learning material superior and Finnish language professor; Häkkinen's interests include written Finnish and Finno-Ugric languages, history, etymology , and Fennistics and Finno-Ugric studies; Häkkinen is the author of several nonfiction books and textbooks of the Finnish language) - https://fi.wikipedia.org/wiki/Kaisa_H%C3%A4kkinen