dirty data

T. Gschwandtner, Gärtner, J., Aigner, W., and Miksch, S., “A Taxonomy of Dirty Time-Oriented Data”, in Lecture Notes in Computer Science (LNCS 7465): Multidisciplinary Research and Practice for Information Systems (Proceedings of the CD-ARES 2012), 2012, p. 58 -- 72.