H.W. Haak; J.A. van Bodegraven; R. Sleeman; R. Verbeiren; L. Ahorner; H. Meidow; G. Grunthal; P. Hoang-Trong; R.M.W. Musson; P. Henni; Z. Schenkova; R. Zimova. The Macroseismic Map of the 1992 Roermond Earthquake, the Netherlands. njg 1994, 73, 265-270.