Panagiotis Symeonidis Alexandros Nanopoulos Apostolos N. Papadopoulos Yannis Manolopoulos Nearest-biclusters collaborative filtering based on constant and coherent values. 51-75 2008 11 Inf. Retr. 1 http://dx.doi.org/10.1007/s10791-007-9038-4 db/journals/ir/ir11.html#SymeonidisNPM08