@ARTICLE{
author={Ostojic Sergej M,Stojanovic Marko DM,Olcina Guillermo},
year={2015},
title={Oxidant-Antioxidant Capacity of Dietary Guanidinoacetic Acid},
journal={ANNALS OF NUTRITION AND METABOLISM},
volume={67},
number={4},
pages={243-246},
document_type={Article},
} 

@ARTICLE{
author={Ostojic Sergej M,Stojanovic Marko DM,Calleja-Gonzalez Julio,Olcina Guillermo,Sekulic Damir,Hoffman Jay R},
year={2014},
title={Performance-enhancing effects of non-selective endothelin receptor antagonist},
journal={INTERNATIONAL JOURNAL OF CARDIOLOGY},
volume={171},
number={2},
pages={294-297},
document_type={Letter},
}