@conference{virtanen2008-SAPA,
author = "Tuomas Virtanen and Annamaria Mesaros and Matti Ryyn{\"a}nen",
keywords = "NMF; vocal; separation",
title = "{C}ombining {P}itch-{B}ased {I}nference and {N}on-{N}egative {S}pectrogram {F}actorization in {S}eparating {V}ocals from {P}olyphonic {M}usic",
url = "https://www.cs.tut.fi/sgn/arg/music/tuomasv/pitchnmf.pdf",
year = "2008",
}