Marandi, Ghasem, et al. “Vitamin B12 Used As Effective Biocatalyst for the Synthesis of pyrano[2,3-c]cromenes and pyrano[2,3-d]pyrimidines”. Iranian Journal of Catalysis, vol. 12, no. 1, Mar. 2022, https://doi.org/10.30495/ijc.2022.689575.