Skiena, Steven (2008). "Searching and Sorting". The Algorithm Design Manual. Springer. p. 109. doi:10.1007/978-1-84800-070-4_4. ISBN978-1-84800-069-8. [H]eapsort is nothing but an implementation of selection sort using the right data structure.
elte.hu
inf.elte.hu
László Szabó (2016). "Algoritmusok"(PDF) (ภาษาฮังการี). Budapest: Eötvös Lóránd University.