Yang J, Jia L, Hao Q, et al. (). „New biodegradable amphiphilic block copolymers of epsilon-caprolactone and delta-valerolactone catalyzed by novel aluminum metal complexes. II. Micellization and solution to gel transition”. Macromolecular Bioscience. 5 (9): 896–903. doi:10.1002/mabi.200500096. PMID16134088.
Yang J, Jia L, Hao Q, et al. (). „New biodegradable amphiphilic block copolymers of epsilon-caprolactone and delta-valerolactone catalyzed by novel aluminum metal complexes. II. Micellization and solution to gel transition”. Macromolecular Bioscience. 5 (9): 896–903. doi:10.1002/mabi.200500096. PMID16134088.