Effect of polarization force on dust-acoustic cnoidal waves in dusty plasma Kuldeep Singh, Yashika Ghai, Nimardeep Kaur and Nareshpal Singh Saini Eur. Phys. J. D, 72 9 (2018) 160 Published online: 18 September 2018 DOI: 10.1140/epjd/e2018-90228-2