Oladeji, A., Sujecki, S., Phillips, A., Seddon, A. B., Benson, T. M., Sakr, H., Tang, Z., Barney, E., Furniss, D., Sójka, ?., Bere?-Pawlik, E., Scholle, K., Lamrini, S., Furberg, P., "Theoretical study of population inversion in active doped MIR chalcogenide glass fibre lasers (invited)", Optical and Quantum Electronics, 2015