Ebrahim Asadollahi, Asadolah Asadi, Farhood Najafi, Saber Zahri, Maryam Zohri, and SeyedMehdi Hosseini Nasr. “Biological Properties of Pegylated PLA (PLA-PEG-PLA) and Its Capability for Intracellular Delivery of Poor Soluble Peptide Drug, Gramicidin”. International Journal of Drug Delivery, vol. 4, no. 2, June 2012, pp. 257-65, https://ijdd.arjournals.org/index.php/ijdd/article/view/148.