English for students of engineeringKokkota, Valmar; Karusoo, Aino; Kukk, Helja-Amanda; Lassmann, Lembit; Loo, Koidu; Ristna, Valda; Tillemann, Helmi1983 https://www.ester.ee/record=b1213814*est

Standardization of foreign language tests series ITAEinväli, E.; Kokkota, Valmar; Kukk, Helja-Amanda; Toomsalu, Marju; Tšetõrkina, Ene; Volgina, Olga; Võrk, Evi-Mai2nd regional seminar Testing in foreign language teaching : Tallinn, February 25-26, 1986 : summaries1986 / p. 32-35 https://www.ester.ee/record=b1217950*est

Texts on data processingKukk, Helja-Amanda1985 https://www.ester.ee/record=b1260288*est