@article {Duncan2009b,
	title = {A Theory of Modes and Modalities},
	volume = {2017},
	number = {2.02.2017},
	year = {2009},
	month = {5.07.2009},
	url = {http://notesfromthegeekshow.blogspot.bg/2009/07/theory-of-modes-and-modalities.html},
	author = {Duncan, Hal}
}
