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Chung, Hoeil; Arnold, Mark A.; Rhiel, Martin; Murhammer, David W.. (1996). Simultaneous Measurements of Glucose, Glutamine, Ammonia, Lactate, and Glutamate in Aqueous Solutions by Near-Infrared Spectroscopy. as/50/2/as-50-2-270.pdf, 50(2), 270–276. doi:10.1366/0003702963906447 
10.1366/0003702963906447