Controlling the probe-absorption and -dispersion via quantum interference from incoherent pumping field in a four-level lambda-type systemM. Sahrai, R. Nasehi, M. Memarzadeh, H. Hamedi and J.B. PoursamadEur. Phys. J. D, 65 3 (2011) 571-579DOI: https://doi.org/10.1140/epjd/e2011-20494-3