C. Rademaker, “C.M. Ridderikhoff, H.J.M. Nellen, Briefwisseling van Hugo Grotius, XVI, oktober 1644-augustus 1645; C.M. Ridderikhoff, H.J.M. Nellen, Briefwisseling van Hugo Grotius, XVII, Supplement 1583-1645”, BMGN-LCHR, vol. 118, no. 1, pp. 97–99, Jan. 2003.