Self-Referential_Sentences

	Gallery of Mathematics / Self-referential Sentences : Produced by Andy Burbanks. Good explanation with examples. - info.lut.ac.uk/departments/ma/gallery/selfref/index.html
	Self-Referential Sentences : Exhaustive lists of "This sentence has three a's" sentences. - home.att.net/~rhhardin/selfref.html
	Solve my base three numerical self-referential sentences puzzle! : The object of this difficult puzzle is to make four sentences mutually truthful by filling in base three numbers. - www.ddewey.net/puzzle/