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2. Sperm motility;Bishop;Physiol Rev,1962
3. Measurement of linear progression of the human spermatozoan as an index of male fertility;Botella;Int J Fertil,1956
4. Apparatus for studying semen metabolism and sperm motility under constant fluid perfusion and known gaseous partial pressures;Dott;J Physiol,1953
5. The objective measurement of sperm motility;Gassner;Fertil Steril,1959