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2. Testing the germicidal activity of quaternary ammonium compounds;BERNSTEIN H.;Soap Sanit. Chemicals,1946
3. Tests of increased severity;CHURCHMAN C.;J. Am. Statistical Assoc.,1946
4. Quaternary ammonium germicides. Comparative methodological studies show the original F.D.A. Method of disinfectant testing to be unsuitable for quaternary ammonium compounds;KLARMANN E.;Soap Sanit. Chemicals,1946
5. A simplified method of evaluating dose-effect experiments;LITCHFIELD J.;J. Pharmaco. Exp. Therap.,1949