Bhattacharyya, D.; Ghosh, A.; Bandyopadhyay, A.; Saha, S.; De, S. Comparison of Electromagnetically Induced Transparency (EIT) Spectra for Six-Level Lambda \(\Lambda)\) and Five-Level V-Type Systems. Jour. Atomic Mole. Conden. Nano Phys 2015, 2, 93-99.