Korvpalli võistlusmäärused1998 https://www.ester.ee/record=b1061554*est

Korvpallireeglid2004 https://www.ester.ee/record=b2005218*est

On rules and refereeing in footballMoktefi, Amirouche; Schang, FabienThe road to universal logic : Festschrift for the 50th birthday of Jean-Yves Beziau. Vol. II2015 / p. 407-415 : ill http://dx.doi.org/10.1007/978-3-319-15368-1_19