Kobayashi, K., Tanaka, M., Tanabe, S., Yatsukawa, Y., Tanaka, M., & Suzuki, T. (2018). Distinguishing glutamic acid in foodstuffs and monosodium glutamate used as seasoning by stable carbon and nitrogen isotope ratios. Heliyon.

Kobayashi, Kazuhiro, Masaharu Tanaka, Soichi Tanabe, Yoichi Yatsukawa, Mitsuru Tanaka, ja Takuya Suzuki. "Distinguishing Glutamic Acid in Foodstuffs and Monosodium Glutamate Used As Seasoning By Stable Carbon and Nitrogen Isotope Ratios." Heliyon 2018.

Kobayashi, Kazuhiro, et al. "Distinguishing Glutamic Acid in Foodstuffs and Monosodium Glutamate Used As Seasoning By Stable Carbon and Nitrogen Isotope Ratios." Heliyon 2018.