Paper  bibtex   

@inproceedings{kohls_pattern_2009,
	title = {A {Pattern} {Language} for {Online} {Trainings}.},
	url = {http://ceur-ws.org/Vol-566/D3_OnlineTraining.pdf},
	urldate = {2013-12-31},
	booktitle = {{EuroPLoP}},
	author = {Kohls, Christian},
	year = {2009},
}