Hakola, E.: Principles of conventional printing. Chapter 2 of: Oittinen, P., Saarelma H. (editors), Print Media β Principles, Processes and Quality, Paperi ja Puu Oy, 2009, ISBN 978-952-5216-33-2
INGEDE database, Bietigheim-Bissingen, Germany, 2020 (individual results not public)
Faul, A. and Putz, H.-J.: Scoring Deinkability. Progress in Paper Recycling, 18 (2009) No. 2, p. 17-23