1. Booij, H. L., 1949: Chapter XIV in Kruyt’s Colloid Science II. Amsterdam.
2. — 1949: Influence of organic compounds on soap and phosphatide coacervales IX. Proc. Kon. Ned. Akad. Wetensch. Amst. 52, 1100–1110.
3. — 1952: Influence of organic compounds on soap and phosphatide coacervates XVII. Rec. trav. chim. Pays-Bas 71, 101–107.
4. — 1952: Neuere Untersuchungen über Koazervate von Seifen. Kolloid-Z. 125, 21–31.
5. — J. H. Blekkingh, and H. Kwestroo van den Bos, 1954: Influence of organic compounds on soap and phosphatide coacervates XXI. Proc. Kon. Ned. Akad. Wetensch. Amst. B57, 340–350.