Gün, H. “Beta Lactamase Activity and Ampicillin Resistancy of Heamophilus Lnfluenzae: [HAEMOPHYLUS İNFLUENZAE’DA BETA LAKTAMAZ AKTİVİTESİ VE AMPİCİLLİN DİRENCİ]”. European Journal of Therapeutics, vol. 2, no. 1, Jan. 1991, pp. 23-26, doi:10.58600/eurjther.19910102-507.