(1)
Heinrich, T.; Böttcher, H.; Bartoszyk, G. D.; Schwartz, H.; Anzali, S.; März, J.; Greiner, H. E.; Seyfried, C. A. Bioisosterism of Fluorine and Cyano As Indole Substituents. Theoretical, in Vitro and in Vivo Examination. Chimia 2004, 58, 143.