Gucker, F. T.; O’Konski, C. T.; Pickard, H. B.; Pitts, J. N. (1947). "A photoelectronic counter for colloidal particles". J Am Chem Soc. 69 (10): 2422–2431. doi:10.1021/ja01202a053. PMID20268300.
Steinkamp, J. A.; Fulwyler, M. J.; Coulter, J. R.; Hiebert, R. D.; Horney, J. L.; Mullancy, P. F. (1973). "A new multiparameter separator for microscopic particles and biological cells". Review of Scientific Instruments. 44 (9): 1301–1310. Bibcode:1973RScI...44.1301S. doi:10.1063/1.1686375. PMID4279087.
Steinkamp, J. A.; Fulwyler, M. J.; Coulter, J. R.; Hiebert, R. D.; Horney, J. L.; Mullancy, P. F. (1973). "A new multiparameter separator for microscopic particles and biological cells". Review of Scientific Instruments. 44 (9): 1301–1310. Bibcode:1973RScI...44.1301S. doi:10.1063/1.1686375. PMID4279087.
Gucker, F. T.; O’Konski, C. T.; Pickard, H. B.; Pitts, J. N. (1947). "A photoelectronic counter for colloidal particles". J Am Chem Soc. 69 (10): 2422–2431. doi:10.1021/ja01202a053. PMID20268300.
Steinkamp, J. A.; Fulwyler, M. J.; Coulter, J. R.; Hiebert, R. D.; Horney, J. L.; Mullancy, P. F. (1973). "A new multiparameter separator for microscopic particles and biological cells". Review of Scientific Instruments. 44 (9): 1301–1310. Bibcode:1973RScI...44.1301S. doi:10.1063/1.1686375. PMID4279087.