Gupta , R. .. R., Kumar , M., & Gupta , V. (1999). Heterocyclic chemistry: Five membered heterocycles. Springer.
Chicago Stili AlıntıGupta , R . R., M. Kumar , ve V. Gupta. Heterocyclic Chemistry: Five Membered Heterocycles. New Delhi: Springer, 1999.
MLA AlıntıGupta , R . R., et al. Heterocyclic Chemistry: Five Membered Heterocycles. Springer, 1999.
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