@article {27466,
	title = {Criticality in the relaxation phase of a spontaneously contracting atria isolated from a frog{\textquoteright}s heart},
	journal = {PHYSICAL REVIEW LETTERS},
	volume = {93},
	year = {2004},
	month = {2004},
	isbn = {0031-90071079-7114},
	author = {Contoyiannis, Y. F. and Diakonos, F. K. and Papaefthimiou, C and Theophilidis, G}
}
