@article {Chang:September 1997:0191-8869:433,
	author = "Chang E.C.",
	author = "Maydeu-Olivares A.",
	author = "D'Zurilla T.J.",
	title = "Optimism and pessimism as partially independent constructs: relationship to positive and negative affectivity and psychological well-being",
	journal = "Personality and Individual Differences",
	volume = "23",
	year = "September 1997",
	abstract = "",
	pages = "433-440(8)",
	url = "http://www.ingentaconnect.com/content/els/01918869/1997/00000023/00000003/art00040"
	doi = "doi:10.1016/S0191-8869(97)00040-8"
}