@misc{indiciaeef1815dad0b8, title = {Poly(ortho ester) biodegradable polymer systems.}, author = {J Heller and K J Himmelstein}, year = {1985}, doi = {10.1016/s0076-6879(85)12033-1}, url = {https://pubmed.ncbi.nlm.nih.gov/3930918/}, note = {Source identifier: 3930918} }