Plasma with two-negative ions and immobile dust particles: planar and non-planar ion-acoustic wave propagationS. K. El-Labany, W. M. Moslem, Kh. A. Shnishin and S. A. El-TantawyEur. Phys. J. D, 61 2 (2011) 409-420DOI: https://doi.org/10.1140/epjd/e2010-10495-1