9Lewin M ,Penhasi A. Novel porous polyurethane coatings. Polymers for Advanced Technologies, 1998, 9:210 - 215
10Spaans C J, De Groot J H, Belgraver R V W, et al. Solvent - free fabrication of micro - porous polyurethane amide and polyurethane - urea scaffolds for repair and replacement of the knee -joint meniscus. Biomaterials,2000, 21 : 2 453 -2 460
