For citations:
Semyonov S.Yu., Sterlikov A.V., Tananykin N.I., Kolbutova K.B., Moiseeva E.S., Dobritskaya N.N., Kurilenko Yu.V., Voronkov A.V. Organization of interlaboratory proficiency testing in laboratories performing direct measurements on the environmental objects. Public Health and Life Environment – PH&LE. 2018;(3):43-48. (In Russ.)