1. M.L. Beck, US 2 585 427, in: A. Cyanamide (Ed.) US, 1952.
2. C.E. Lowe, US 2 668 162, in: DuPont (Ed.) US, 1954.
3. N.A. Higgins, US 2 767 945, in: DuPont (Ed.) US, 1954.
4. Dielectric and viscoelastic behaviors of poly (hydroxyacetic ester);Ishida;J. Polym. Sci., Part B: Polym. Lett.,1965
5. Physical and chemical characteristics polyglycolide;Chujo;Die Makromolekulare Chemie.,1967