Tonu Puu

Tönu Puu

(25 September 1936 – 11 July 2020)

https://www.researchgate.net/profile/Toenu-Puu

https://scholar.google.se/citations?user=fJTh8S0AAAAJ&hl=en

https://en.wikipedia.org/wiki/T%C3%B5nu_Puu