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Michael Kasha, Discussions of the Faraday Society9,14–19(1950). Original paper text inspected via scan at www.scribd.com/document/834716858/Kasha-1950 , not the host-generated summary. Printed p.14 abstract and p.15 Internal Conversion: relationship between radiationless transitions among states of like multiplicity and the lowest excited emitting level. These are spectroscopic regularities discussed for the studied molecules, not an assertion of an exception-free law.

Pradeep K. Sengupta and Michael Kasha, Chemical Physics Letters 68(2–3), 382–385 (15 December 1979). Original article scan text inspected at www.scribd.com/document/830831361/ESIPT ; use the article text, not the host-generated summary. Printed pp.382–383, Figures1–2: absorption maximum around 352 nm and green emission around 520 nm in 2-methylbutane at room temperature; Figure2 compares room-temperature tautomer fluorescence with violet fluorescence in a rigid 77 K matrix. Figure1 identifies a Cary15 spectrophotometer; Figure2 identifies a Varian SF330 spectrofluorimeter. Printed p.384 discusses excitation spectra and deuteration comparisons. The original byline gives both first names; no additional initials expanded.