Ostojic Sergej M,Stojanovic Marko DM,Olcina Guillermo (2015) Oxidant-Antioxidant Capacity of Dietary Guanidinoacetic Acid, ANNALS OF NUTRITION AND METABOLISM, vol. 67, br. 4, str. 243-246 (Article) 

Ostojic Sergej M,Stojanovic Marko DM,Calleja-Gonzalez Julio,Olcina Guillermo,Sekulic Damir,Hoffman Jay R (2014) Performance-enhancing effects of non-selective endothelin receptor antagonist, INTERNATIONAL JOURNAL OF CARDIOLOGY, vol. 171, br. 2, str. 294-297 (Letter)