Oscillating on borrowed time: diffusible signals from immortalized suprachiasmatic nucleus cells regulate circadian rhythmicity in cultured fibroblasts. The Journal Of Neuroscience : The Official Journal Of The Society For Neuroscience, 21(20), 7937-43. Retrieved de http://www.jneurosci.org/cgi/pmidlookup?view=long&pmid=11588167 (Original work published 2001)
. (2001).