@inproceedings{al2017unsupervised,
	doi = {10.1007/978-3-319-59876-5_44},
	pages = {399--407},
	year = {2017},
	booktitle = {International Conference on Image Analysis and Recognition (ICIAR)},
	author = {Ali Al-Raziqi and Joachim Denzler},
	title = {Unsupervised Group Activity Detection by Hierarchical Dirichlet Processes},
}