1. All-Union State Standard (GOST) 8.101-73: “State System for Ensuring Uniform Measurements (GSI). Special State Standard and All-Union testing system for wavelength measurements in the 0.186–30-Μ range for spectroscopes.”
2. N. R. Batarchukova and V. A. Nikitin, Izmer. Tekh., No. 9 (1975).
3. N. R. Batarchukova and V. N. Galkina, Izmer. Tekh., No. 3 (1975).
4. F. I. Clarke, J. Res. Nat. Bur. Stand.,76A, No. 5 (1972).
5. R. Mavrodineanu, J. Res. Nat. Bur. Stand.,76A, No. 5 (1972).