HAUPTMAN, Alenka, 2010, Equating of grades at basic and higher level of mathematics achievement. Advances in methodology and statistics [na spletu]. 2010. Vol. 7, no. 2, p. 167–181. [Dostopano 29 marec 2025]. Pridobljeno s: http://mrvar.fdv.uni-lj.si/pub/mz/mz7.1/hauptman.pdf