A Comparison of Classification by Two Versions of the Method of Generalized Portraits. - T. F. Schatzki (IEEE Trans. Syst. Man Cybern., 1974)

Characterization of growing lettuce from density contours–I. Head selection. - T. F. Schatzki; S. C. Witt; D. E. Wilkins; D. H. Lenker (Pattern Recognit., 1981)

Characterization of growing lettuce from density contours–II. Statistics. - T. F. Schatzki; S. C. Witt; D. E. Wilkins; D. H. Lenker (Pattern Recognit., 1981)

Recognition of Agricultural Objects by Shape. - T. F. Schatzki; A. Grossman; R. Young (IEEE Trans. Pattern Anal. Mach. Intell., 1983)