Groenveld, S. 1990. A.G.H. Bachrach, R.C. Collmer, Lodewijck Huygens. The English Journal 1651-1652. BMGN - Low Countries Historical Review. 105, 1 (Jan. 1990), 107–109. DOI:https://doi.org/10.18352/bmgn-lchr.3195.