For citations:
Aleksandrova N.V., Levi D.T., Nakonechnaya A.V., Savina A.A. Specific Aspects of Tuberculin Products Standardisation. BIOpreparations. Prevention, Diagnosis, Treatment. 2019;19(1):56-63. (In Russ.) https://doi.org/10.30895/2221-996X-2019-19-1-56-63