Pečarić, A. Aglić Alijanović, R. Hoxha, J. “ON SOME ČEBYŠEV-GRÜSS TYPE INTEGRAL INEQUALITIE”. Matematichki Bilten, vol. 30, no. 1, Jan. 2006, https://bilten.smm.org.mk/index.php/bilten/article/view/1725.