@article {Manske2014,
	title = {A flexible and extendable learning analytics infrastructure},
	journal = {Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)},
	volume = {8613 LNCS},
	year = {2014},
	pages = {123-132},
	author = {Tobias Hecking and Sven Manske and Bollen, L. and Govaerts, S. and Vozniuk, A. and H.Ulrich Hoppe}
}
