For citations:
Kozin A.V., Abramova L.S., Guseva E.S., Derunets I.V. Establishment of metrological parameters of the method for measuring the protein mass fraction in fish food products by the Kjeldahl method. Food systems. 2021;4(4):239-245. (In Russ.) https://doi.org/10.21323/2618-9771-2021-4-4-239-245