Controlling the optical bistability in a three-level quantum-dot molecule via gate voltage and indirect incoherent pump fieldHossein Jafarzadeh, Mostafa Sahrai and Kazem Jamshidi-GhalehEur. Phys. J. D, 68 5 (2014) 115DOI: https://doi.org/10.1140/epjd/e2014-50036-4