Breen, Richard (1996). "The Tobit Model for Censored Data". Regression Models : Censored, Samples Selected, or Truncated Data. Thousand Oaks: Sage. pp. 12–33. ISBN 0-8039-5710-6. 0-8039-5710-6
Buchinsky, Moshe; Hahn, Jinyong (1998). "An Alternative Estimator for the Censored Quantile Regression Model". Econometrica. 66 (3): 653–671. doi:10.2307/2998578. JSTOR 2998578. /wiki/Econometrica
Lewbel, Arthur; Linton, Oliver (2002). "Nonparametric Censored and Truncated Regression". Econometrica. 70 (2): 765–779. doi:10.1111/1468-0262.00304. JSTOR 2692291. http://eprints.lse.ac.uk/2060/