@Article{ Pratesi_Ranalli_Salvati:687-701,

author = { M Pratesi and Maria Giovanna Ranalli and N Salvati } ,

title = { Semiparametric M-quantile regression for estimating the proportion of acidic lakes in 8-digit HUCs of the Northeastern US },

journal = { Environmetrics },

year = { 2008 },

pages = { 687-701 },

}