1. Applied Nonparametric Statistics, Houghton Mifflin, Boston, MA (1978).
2. Quantitative structure-activity relationships for 2-[(phenylmethyl)sulfonyl]pyridine 1-oxide herbicides
3. (ed.), Research Methods in Weed Science, 3rd edn, pp. 43-46, Southern Weed Science Society, Champaign, IL (1986).
4. RS/1® Release 4, BBN Software Products Corp., 10 Fawcett St., Cambridge, MA 02238 (1989).