@article {DeLanghe2010,
	title = {Increasing returns in science: a model of the dynamics of scientific activity},
	journal = {Logic Journal of the IGPL},
	volume = {18},
	number = {2},
	year = {2010},
	pages = {278-294},
	author = {De Langhe, Rogier and Greiff, Matthias}
}
