found: Kaarla, Riina. Муми-тролли для самых маленьких, 2024, c2022:t.p. (artists Riina and Sami Kaarla)
found: Ahlback Agency website, May 30, 2024(Sami Kaarla; writer-illustrator; he has written/illustrated dozens of internationally renowned books; he writes/illustrates the YA Nordic Horror series, the Pet Friends and Pet Agents series, and Moomin books based on Tove Jansson's beloved characters, with his wife, Riina)
found: TAMMI website, May 30, 2024(Sami Kaarla; lives in Siuntio)
found: Lastenkirjainstituutti website, May 30, 2024(Sami Kaarla; b. 1973; children's writer)
