• Naatan Kvarki raamaturiiulAgur, UstusHorisont1969 / lk. 69-70 https://www.ester.ee/record=b1072243*est http://www.digar.ee/id/nlib-digar:288343 https://www.ester.ee/record=b1300663*est https://www.ester.ee/record=b1221991*est https://www.ester.ee/record=b1210829*est https://www.ester.ee/record=b1337634*est