Ultra-high-strength absorbable selfreinforced polyglycolide (SR-PGA) composite rods for internal fixation of bone fractures: In vitro and in vivo study. - Tormala,P.; Vasenius,S.; Vainionpaa,S.; Laiho,J.; Pohjonen,T.; Rokkanen,P. (J Biomed Mater Res, 1991)