Mr Slobodanka Todorović: Stručna klasifikacija po sistemu UDK: u lisnom i elektronskom katalogu, Narodna biblioteka Srbije, Beograd, 2001.

I. C. McIlwaine: The universal Decimal Classification: a guide to its use, UDC Consortium, Hague, 2000

Extensions and Corrections to the UDC, UDC Consortium, Hague, 1995.

Extensions and Corrections to the UDC, UDC Consortium, Hague,1996