[1. Szroeder, P., Rozpłoch, F., & Marciniak, W. (2003). Two-temperature EPR measurements of multi-walled carbon nanotubes. Solid State Phenom., 94, 275–278. http://www.scientific.net.10.4028/www.scientific.net/SSP.94.275]Search in Google Scholar
[2. Rozpłoch, F. (1984). Negative magnetoresistivity in pyrolytic coal. Habilitation thesis, Nicolaus Copernicus University, Toruń, Poland.]Search in Google Scholar
[3. Pilawa, B. (2000). Evolution of paramagnetic centers during thermal decomposition of coal macerals. Habilitation thesis, Pedagogical University, Zielona Góra, Poland.]Search in Google Scholar
[4. Duber, S., & Więckowski, A. B. (1984). Excited triplet states in bituminous coal. Fuel, 63(10), 1474–1475. DOI: 10.1016/0016-2361(84)90363-6.10.1016/0016-2361(84)90363-6]Search in Google Scholar
[5. Duber, S., & Więckowski, A. B. (1984). EPR study of excited triplet states and interactions between the molecular phases in coal. In L. Petrakis & J. P. Fraissard (Eds.), Magnetic resonance. Introduction, advanced topics and applications to fossil energy (pp. 667–678). Dordrecht: D. Reidel Publ. Co.]Search in Google Scholar
[6. Więckowski, A. B., Pilawa, B., Świątkowska, L., Wojtowicz, W., Słowik, G. P., & Lewandowski, M. (2000). Thermally excited multiplet states in macerals separated from bituminous coal. J. Magn. Reson., 145(1), 62–72. DOI: 10.1006/jmre.2000.2044.10.1006/jmre.2000.2044]Search in Google Scholar
[7. Więckowski, A. B., Pilawa, B., Świątkowska, L., Wojtowicz, W., & Słowik, G. (1998). Paramagnetic centres in exinite, vitrinite and inertinite. Appl. Magn. Reson., 15(3/4), 489–501. DOI: 10.1007/BF03162031.10.1007/BF03162031]Search in Google Scholar
[8. Słowik, G. P., Wojtowicz, W., & Więckowski, A. B. (2005). EPR evidence for thermally excited triplet states in exinite, vitrinite and inertinite separated from bituminous coal. Acta Phys. Pol. A, 108(1), 171–176. http://przyrbwn.icm.edu.pl/APP/PDF/108/a108z122.pdf.]Search in Google Scholar
[9. Słowik, G. P., & Więckowski, A. B. (2010). Paramagnetic centres in coal macerals. Acta Phys. Pol. A, 118(3), 507–510. http://przyrbwn.icm.edu.pl/APP/PDF/118/a118z3p15.pdf.]Search in Google Scholar
[10. Mrozowski, S. (1965). Electron spin resonance in neutron irradiated and in doped polycrystalline graphite – Part I. Carbon, 3(3), 305–320. DOI: 10.1016/0008-6223(65)90065-5.10.1016/0008-6223(65)90065-5]Search in Google Scholar
[11. Yen, T. F., & Young, D. K. (1973). Spin excitations of bitumens. Carbon, 11(1), 33–41. DOI: 10.1016/0008-6223(73)90006-7.10.1016/0008-6223(73)90006-7]Search in Google Scholar
[12. Najder-Kozdrowska, L., Pilawa, B., Buszman, E., Więckowski, A. B., Świątkowska, L., Wrześniok, D., & Wojtowicz, W. (2010). Triplet states in DOPA-melanin and in its complexes with kanamycin and copper Cu(II) ions. Acta Phys. Pol. A, 118(4), 613–618. http://przyrbwn.icm.edu.pl/APP/PDF/118/a118z4p15.pdf.]Search in Google Scholar
[13. Bleaney, B., & Bowers, K. D. (1952). Anomalous paramagnetism of copper acetate. Proc. Roy. Soc. A-Math. Phys. Eng. Sci., 214(1119), 451–465. DOI: 10.1098/rspa.1952.0181.10.1098/rspa.1952.0181]Search in Google Scholar
[14. Gong, D., & Yang, H. (2013). The discovery of free radicals in ancient silk textiles. Polym. Degrad. Stabil., 98(9), 1780–1783. DOI: 10.1016/j.polymdegradstab.2013.05.011.10.1016/j.polymdegradstab.2013.05.011]Search in Google Scholar
[15. Liu, J., Jiang, X., Shen, J., & Zhang, H. (2014). Chemical properties of superfine pulverized coal particles. Part 1. Electron paramagnetic resonance analysis of free radical characteristics. Adv. Powder Technol., 25(3), 916–925. DOI: 10.1016/j.apt.2014.01.021.10.1016/j.apt.2014.01.021]Search in Google Scholar