In this paper simple analytical equations for the reflection and transmission coefficients of fluorescent turbid media are given. The case of weakly absorbing optically thick media is considered (e.g., paper, textiles, tissues). The calculations are performed in the framework of the two-flux approximation for finite layers under monochromatic illumination conditions. The relationships of Kubelka-Munk parameters to the true absorption and transport extinction coefficients of fluorescent turbid media are derived. The results can be used for the development of various optimization procedures in the paper and textile industries and also in the area of fluorescence spectroscopy of turbid media.