Davies, D. G. (January 1976). "Cerebrospinal fluid sampling technique and Astrup pH and PCO2 values". Journal of Applied Physiology. 40 (1): 123–125. doi:10.1152/jappl.1976.40.1.123. ISSN0021-8987. PMID2575.
Davies, D. G. (January 1976). "Cerebrospinal fluid sampling technique and Astrup pH and PCO2 values". Journal of Applied Physiology. 40 (1): 123–125. doi:10.1152/jappl.1976.40.1.123. ISSN0021-8987. PMID2575.
Davies, D. G. (January 1976). "Cerebrospinal fluid sampling technique and Astrup pH and PCO2 values". Journal of Applied Physiology. 40 (1): 123–125. doi:10.1152/jappl.1976.40.1.123. ISSN0021-8987. PMID2575.