@ARTICLE{
author={Ostojic Sergej M,Calleja-Gonzalez Julio,Jakovljevic Djordje G,Vucetic V,Ahumada F},
year={2010},
title={Ultra short-term heart rate recovery in athletes of different sports},
journal={MEDICINA DELLO SPORT},
volume={63},
number={2},
pages={145-152},
document_type={Article},
} 

@ARTICLE{
author={Ostojic Sergej M,Markovic G,Calleja-Gonzalez Julio,Jakovljevic Djordje G,Vucetic V,Stojanovic Marko DM},
year={2010},
title={Ultra short-term heart rate recovery after maximal exercise in continuous versus intermittent endurance athletes},
journal={EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY},
volume={108},
number={5},
pages={1055-1059},
document_type={Article},
}