[1] [OL] http://www.bruker.com

[2] [OL] http://www.activespectrum.com

[3] [OL] http://www.magnettech.de

[4] [OL] http://www.resonanceinstruments.com

[5] [OL] http://www.adani.by

[6] [OL] http://www.resonance-m.com

[7] Bogachev Yu V, Drapkin V Z, Knyazev M N, et al. Compact problem-oriented EPR equipment. (Rus.)[J]. Izvestia SPbSETU “LETI”, Russia, 2009, 7: 12－22.

[8] Hogg R D. A low cost X-band IMPATT diode marginal oscillator for EPR[J]. Am J Phys, 1973, 41(2): 224－229.

[9] Rupp L W, Walsh W M, Steinfeld A. Simplified microwave frequency electron spin resonance spectrometer[J]. Am J Phys, 1970, 38(2): 238－242.

[10] Bogachev Yu V, Drapkin V Z, Knyazev M N, et al. EPR and ENDOR investigations of isoprene polymerization catalysts. The EPR application in synthetic rubber industry. (Rus.)[J]. Izvestia SPbSETU “LETI”, Russia, 2009, 3: 9－14.

[11] Saakov V S, Drapkin V Z, Krivchenko A I, et al. Derivative Spectrophotometry and Electron Spin Resonance (ESR) Spectroscopy for Ecological and Biological Questions[M]. New York: Springer-Verlag Wien, 2013.

[12] Bogachev Yu V, Drapkin V Z, Knyazev M N, et al. Magnetic Resonance. Basics and Applications (Rus.)[M]. Russia: Saint-Petersburg, SPbSETU “LETI”, 2009.

[13] Gancheva V, Yordanov N D, Callens F, et al. An international intercomparison trial on “self-calibrated” alanine EPR dosimeters[J]. Radiat Phys Chem, 2008, 77(3): 357－364.