Dušan Djukić, Vladimir Janković, Ivan Matić, Nikola Petrović
The IMO Compendium - 2nd ed. 2011 - Springer New York 2011 - Problem Books in Mathematics .
9781441998545
Mathematics and Statistics
The IMO Compendium - 2nd ed. 2011 - Springer New York 2011 - Problem Books in Mathematics .
9781441998545
Mathematics and Statistics