• Defects and their formation processes in non-stoichiometric II-VI compoundesErm, Ants; Krustok, Jüri; Kukk, Peeter-Enn32nd IUPAC Congress, Stockholm, 2-7 August 1989 : book of abstracts1989 / p. 94 https://www.ester.ee/record=b4149424*est
• Recrystallization of powder materials in molten saltsMellikov, Enn; Hiie, Jaan; Tuvike, Tiit32nd IUPAC Congress, Stockholm, 2-7 August 1989 : book of abstracts1989 / p. 111 https://www.ester.ee/record=b4149424*est
• Trace chemistry in processing phosphate rockVeiderma, Mihkel; Viisimaa, Ludmilla32nd IUPAC Congress, Stockholm, 2-7 August 1989 : book of abstracts1979 / p. 57 https://www.ester.ee/record=b4149424*est https://kirjandus.geoloogia.info/en/reference/15136