Steinborn-Rogulska, I., and G. Rokicki. “Solid-State Polycondensation (SSP) As a Method to Obtain High Molecular Weight Polymers. Part II. Synthesis of Polylactide and Polyglycolide via SSP”. Polimery, vol. 58, no. 2, Feb. 2013, pp. 85-92, doi:10.14314/polimery.2013.085.