For citations:
Petrashen A.G., Sytenko N.V. Laser generation without inversion on the fine levels of the helium atom. Nanosystems: Physics, Chemistry, Mathematics. 2016;7(2):384-393. https://doi.org/10.17586/2220-8054-2016-7-2-384-393
Petrashen A.G., Sytenko N.V. Laser generation without inversion on the fine levels of the helium atom. Nanosystems: Physics, Chemistry, Mathematics. 2016;7(2):384-393. https://doi.org/10.17586/2220-8054-2016-7-2-384-393