Mathiassen, Terje: Old PrussianDr. philos. Terje Mathiassen (19381999) was Lecturer of Russian at the University of Oslo from 1971 to 1985, and Professor of Slavic and Baltic Linguistics from 1985 until his death in 1999. During his lifetime Professor Mathiassen published a large number of influential books and articles, including his doctoral dissertation Studien zum slavischen und indoeuropischen Langvokalismus (1970; published 1974), Russisk grammatikk (1990; second, revised