Studien zur Indologie und Iranistik. — 1980. — Vol. 5–6 ( = Festschrift Paul Thieme). — P. 137–152. — (Reprinted in Klingenschmitt Gert. Aufsätze zur Indogermanistik, ed. by M. Janda, R. Lühr, J. Matzinger und S. Schaffner. Hamburg: Dr. Kovac, 2005, P. 181–195).
Etymologies for legal terms across IE languages (Lat. praedium, Skt. r̥ṇá- 'debt', Gmc. skulþi- 'what is due', Gk. ὀφείλω).