Hein Meidow. “The Macroseismic Field of the Roermond Earthquake of April 13, 1992, Has Been Compared With Those of Large Historical Earthquakes (ML ≥ 5.5) in the Lower Rhine Embayment and Its Vicinity: Those of Düren (1755 ,1756), Tollhausen (1878), North-Brabant(1932)”. Netherlands Journal of Geosciences, vol. 73, Jan. 1994, pp. 283-9, https://njgjournal.nl/index.php/njg/article/view/12475.