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2. Klin;BINNS, J.H.; SHERRIFF, H.M.;Ibid; Plast reconstr,1975
3. Scand;HOLMSTROM, H.; BARTHOLDSON, L.; JOHANSON, B.;Y. plast. reconstr. Surg,1975
4. Amer. 3t;LEVENTHAL, H.H.; MESSER, R.J.;Surg; Plast,1972
5. MEYTHALER, H. (1973) V. Graefes Arch. Ophthal., I87, III