dragoljub.in.rs
https://www.matematiranje.in.rs/Prijemni_2014_formulice/14.%20PIRAMIDE-formulice.pdf
https://matematiranje.in.rs/III%20godina/1.planimetrija%20i%20poliedri/6.Piramida%20i%20zarubljena%20piramida.pdf
https://vladanastefanovicandric.wordpress.com/wp-content/uploads/2015/07/zarubljena-piramida-zadaci.pdf
https://osnove1.wordpress.com/wp-content/uploads/2019/11/piramida-zadaci.pdf