For citations:

Akhmetzhanov T.F., Drozdova A.N., Popov A.M. Calibration Free LIBS for the Determination of Mn/Fe Ratio in Ferromanganese Nodules with Portable Diode Pumped Solid State Laser. Zhurnal Prikladnoii Spektroskopii. 2022;89(4):463-469. (In Russ.) https://doi.org/10.47612/0514-7506-2022-89-4-463-469