T. CAMELBEECK; T. VAN ECK; R. PELZING; L. AHORNER; J. LOOHUIS; H. W. HAAK; P. HOANG-TRONG; P. HOANG-TRONG. The 1992 Roermond earthquake, the Netherlands, and its aftershocks. Netherlands Journal of Geosciences, v. 73, p. 181-197, 1 Jan. 1994.