@unpublished{betti_wissenschaftslehre_nodate,
	title = {Wissenschaftslehre {Wiki} {Project} [deprecated]},
	author = {Betti, Arianna and Blok, Johan and Huijgen, Paul and Loeb, Iris and Roski, Stefan and Sikkel, Constantijn and Koleva, Mariya and van den Berg, Hein},
	keywords = {Bolzano},
}