@article {1518,
	title = {Absorption spectra of planarian visual pigments and two states of the metarhodopsin intermediates},
	volume = {69},
	year = {1999},
	month = {1999//},
	url = {http://dx.doi.org/10.1111/j.1751-1097.1999.tb05312.x},
	author = {Azuma, K. and Iwasaki, N. and Ohtsu, K.}
}
