1. Agrup, G., Björklund, A., Falck, B., Jacobsson, S., Lindvall, O., Rorsman, H., Rosengren, E.: Fluorescence histochemical demonstration of dopa thioethers by condensation with gaseous formaldehyde. Histochemistry52, 179?186 (1977).
2. Anton, A. H., Sayre, D. F.: The distribution of dopamine and dopa in various animals and a method for their determination in diverse biological material. J. Pharmacol. Exp. Therap.145, 326?336 (1964).
3. Baumgarten, H. G., Braak, H., Wartenberg, H.: Demonstration of dense core vesicles by means of pyrogallol derivatives in noradrenaline containing neurons from the organ vasculosum hypothalami of Lacerta. Z. Zellforsch.95, 396?404 (1969).
4. Björklund, A., Falck, B., Owman, C.: Fluorescence microscopic and microspectrofluorometric techniques for the cellular localization and characterization of biogenic amines. In: The Thyroid and Biogenic Amines (Rall, J. E., Kopin, I. J., eds.), pp. 318?368. North-Holland. 1972.
5. Björklund, A., Falck, B.: Cytofluorometry of biogenic monoamines in the Falck-Hillarp method, structural identification by spectral analysis. In: Fluorescence Techniques in Cell Biology (Thaer, A. A., Sernetz, M., eds.), pp. 171?181. Berlin-Heidelberg-New York: Springer. 1973.