Transition from amplified spontaneous emission to laser action in disordered media of R6G dye and TiO2 nanoparticles doped with PMMA polymerBaha. T. Chiad, Mohammed. A. Hameed, Kamil H. Latif and Firas J. AL-MalikiJ. Eur. Opt. Soc.-Rapid Publ., 6 (2011) 11049DOI: https://doi.org/10.2971/jeos.2011.11049