@booklet {Desana2016,
	title = {Expectation Maximization for Sum-Product Networks as Exponential Family Mixture Models},
	year = {2016},
	note = {ArXiv},
	month = {April},
	url = {http://arxiv.org/abs/1604.07243},
	author = {Desana, M. and Schn{\"o}rr, C.}
}
