Arthur Flexer Georg Gruber Georg Dorffner Continuous Unsupervised Sleep Staging Based on a Single EEG Signal. 1013-1018 2002 conf/icann/2002 ICANN http://link.springer.de/link/service/series/0558/bibs/2415/24151013.htm db/conf/icann/icann2002.html#FlexerGD02