Torbjorn E. Tornqvist. 1995. “Discussion: Alluvial Architecture of the Quaternary Rhine-Meuse River System in the Netherlands, by G.H.J. Ruegg, Geologie En Mijnbouw 72: 321-330, 1994”. Netherlands Journal of Geosciences 74 (January):183-86. https://njgjournal.nl/index.php/njg/article/view/12418.