Hanneke Paulssen, Bernard Dost, and Torild van Eck. “The April 13, 1992 Earthquake of Roermond (The Netherlands); First Interpretation of the NARS Seismograms”. Netherlands Journal of Geosciences, vol. 71, Jan. 1992, pp. 91-98, https://njgjournal.nl/index.php/njg/article/view/12534.