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2. Gamma-radiolysis of 6-aminopenicillanic acid and its derivatives;Dziegielewski;Nukleonika,1973
3. The sterilization of tetracycline hydrochloride by gamma-rays;Jacobs;Pharm. Acta Helv.,1977
4. Cephalosporin powders sterilized by γ-rays;Jacobs;J. Pharm. Pharmacol.,1979
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