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Pertoft, Håkan; Laurent, Torvard C. (1977). "Isopycnic Separation of Cells and Cell Organelles by Centrifugation in Modified Colloidal Silica Gradients". Methods of Cell Separation. Boston, MA: Springer US. pp. 25–65. doi:10.1007/978-1-4684-0820-1_2. ISBN978-1-4684-0822-5.
Pertoft, H.; Laurent, T.C.; Laas, T.; Kagedal, L. (1978). "Density gradients prepared from colloidal silica particles coated by polyvinylpyrrolidone (Percoll)". Analytical Biochemistry. 88 (1): 271–282. doi:10.1016/0003-2697(78)90419-0. PMID211867.
Rüssmann L, Jung A, Heidrich HG (1982). "The use of percoll gradients, elutriator rotor elution, and mithramycin staining for the isolation and identification of intraerythrocytic stages of Plasmodium berghei". Zeitschrift für Parasitenkunde. 66 (3): 273–280. doi:10.1007/BF00925344. PMID6177116.
Pertoft, H.; Laurent, T.C.; Laas, T.; Kagedal, L. (1978). "Density gradients prepared from colloidal silica particles coated by polyvinylpyrrolidone (Percoll)". Analytical Biochemistry. 88 (1): 271–282. doi:10.1016/0003-2697(78)90419-0. PMID211867.