• Kujutav geomeetria. 1Humal, Arnold; Rünk, Ott; Garšnek, Aleksander1946 https://www.ester.ee/record=b1184124*est
• Kujutav geomeetria. 1Reier, Herman Voldemar1927 https://www.ester.ee/record=b1148693*est
• Kujutav geomeetria. 1Humal, Arnold; Rünk, Ott; Garšnek, Aleksander1950 https://www.ester.ee/record=b1399264*est