@article {ghoshal2009properties,
	title = {Properties of the positronium negative ion interacting with exponential cosine-screened Coulomb potentials},
	journal = {Few-Body Systems},
	volume = {46},
	number = {4},
	year = {2009},
	note = {n/a},
	pages = {249{\textendash}256},
	publisher = {Springer},
	abstract = {n/a},
	author = {Ghoshal, Arijit and Ho, YK}
}
