@ARTICLE{
author={Markovic Olivera R,Pikula Milenko,Zubac Marina},
year={2019},
title={A Critical Analysis of the PISA Mathematics Tasks},
journal={CROATIAN JOURNAL OF EDUCATION-HRVATSKI CASOPIS ZA ODGOJ I OBRAZOVANJE},
volume={21},
number={1},
pages={233-274},
document_type={Article},
} 

@ARTICLE{
author={Bikic Naida,Maricic Sanja M,Pikula Milenko},
year={2016},
title={The effects of differentiation of content in problem-solving in learning geometry in secondary school},
journal={EURASIA JOURNAL OF MATHEMATICS SCIENCE AND TECHNOLOGY EDUCATION},
volume={12},
number={11},
pages={2783-2795},
document_type={Article},
} 

@ARTICLE{
author={Pikula Milenko,Vladicic Vladimir,Markovic Olivera R},
year={2013},
title={A solution to the inverse problem for the Sturm-Liouville-type equation with a delay},
journal={FILOMAT},
volume={27},
number={7},
pages={1237-1245},
document_type={Article},
}