@conference {hoppe_using_2013,
	title = {Using Network Text Analysis to Characterise Teachers{\textquoteright} and Students{\textquoteright} Conceptualisations in Science Domains},
	booktitle = {IWTA 2013-1},
	volume = {2},
	year = {2013},
	note = {00000},
	pages = {3},
	author = {H. Ulrich Hoppe and Melanie Erkens and Clough, G and Oliver Daems and Adams, A}
}
@conference {ziebarth_using_2009,
	title = {Using Data Mining Techniques to Support the Creation of Competence Ontologies.},
	booktitle = {AIED},
	year = {2009},
	note = {00009},
	pages = {223{\textendash}230},
	author = {Sabrina Ziebarth and Nils Malzahn and H. Ulrich Hoppe}
}
