@article {cokkinos1976influence,
	title = {Influence of heart rate increase on uncorrected pre-ejection period/left ventricular ejection time (PEP/LVET) ratio in normal individuals.},
	journal = {Heart},
	volume = {38},
	number = {7},
	year = {1976},
	pages = {683{\textendash}688},
	publisher = {BMJ Publishing Group Ltd},
	author = {Cokkinos, D.V. and Heimonas, ET and Demopoulos, JN and Harralambakis, A and Tsartsalis, G and Gardikas, CD}
}
