"Synthesis, characterization and in vivo anthelmintic activity of some novel N-Mannich bases of benzimidazoles".
Yogesh Murti, Rashmi Arora, Devender Pathak.
Journal of the Indian Chemical Society; vol. 87; nb. 5; (2010); p. 627 - 631.
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http://dx.doi.org/10.1002/chin.201045122