\input zb-basic \input zb-ioport \iteman{io-port 70891735} \itemau{Zdunek, Rafal} \itemti{Convolutive nonnegative matrix factorization with Markov random field smoothing for blind unmixing of multichannel speech recordings} \itemso{NOLISP, 25-32 (2011).} \itemcc{} \itemut{} \itemli{doi:10.1007/978-3-642-25020-0\_4} \end