Electrophilic substitution of five-membered rings

Marino, G., Electrophilic Substitutions of Five-Membered Rings, 13, 235. 

Mechanisms and rates of die electrophilic substitution reactions of heterocycles , Katritzky, A. R. and Fan, W.-Q., Heterocycles, 1992, 34, 2179. Electrophilic substitution of heteroaromatic six-membered rings , Katritzky, A. R. and Johnson, C. T>.,Angew. Chem., Int. Ed. Engl., 1967, 6, 608. Electrophilic substitutions of five-membered rings , Marino, G., Adv. Heterocycl. Chem., 1971, 13, 235. 

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