Schmidt, W., Houang, R., & Cogan, L. (2002). „A coherent curriculum”. American Educator. 26 (2): 1—18.CS1 одржавање: Вишеструка имена: списак аутора (веза).
Depuydt, Leo (1. 1. 1998). „Gnomons at Meroë and Early Trigonometry”. The Journal of Egyptian Archaeology. 84: 171—180. JSTOR3822211. doi:10.2307/3822211.
Fritz, Kurt Von (1945). „The Discovery of Incommensurability by Hippasus of Metapontum”. The Annals of Mathematics. 46 (2): 242—264. JSTOR1969021. doi:10.2307/1969021.
Choike (1980). „The Pentagram and the Discovery of an Irrational Number”. The Two-Year College Mathematics Journal. 11 (5): 312—316. JSTOR3026893. doi:10.2307/3026893.
Depuydt, Leo (1. 1. 1998). „Gnomons at Meroë and Early Trigonometry”. The Journal of Egyptian Archaeology. 84: 171—180. JSTOR3822211. doi:10.2307/3822211.
Fritz, Kurt Von (1945). „The Discovery of Incommensurability by Hippasus of Metapontum”. The Annals of Mathematics. 46 (2): 242—264. JSTOR1969021. doi:10.2307/1969021.
Choike (1980). „The Pentagram and the Discovery of an Irrational Number”. The Two-Year College Mathematics Journal. 11 (5): 312—316. JSTOR3026893. doi:10.2307/3026893.