@article {xu1991polarity,
	title = {Polarity Effects of Solvent Mixtures in Exciplexes Formed on Cyclization of Polystyrene Chains},
	journal = {Polymer},
	volume = {32},
	year = {1991},
	pages = {84{\textendash}87},
	author = {M. A. Winnik* and H. Xu and J. M. G. Martinho}
}
