) ISBN 978-953-150-840-7* "Etymological Dictionary of Proto-Celtic", (Brill, Leiden & Boston, 2009) ISBN 978-90-04-17336-1* "Slavic Nominal Word-Formation.
) ISBN 978-953-150-840-7* "Etymological Dictionary of Proto-Celtic", (Brill, Leiden & Boston, 2009) ISBN 978-90-04-17336-1* "Slavic Nominal Word-Formation.