1. Quantitative measurements with the reflecting polarising microscope;Bowie;Trans. Inst. Mining Metall.,1964
2. Stable reflectance standards for coal petrography;Juckes;Mineralogy and Materials News Bulletin for Quantitative Microscopic Methods,1974
3. Medida de reflectancias en inmersión en aceite mediante el método directo y cálculo de n y de k de 400 a 1,100 nm;Nogués Carulla;Acta Geologica Hispanica,1976
4. Influence of light reflection at the objective in the quantitative measurement of reflectivity with the microscope;Piller;Mineral Mag.,1967