Classification and Archaeological Units:

Dunnell, Robert C.
  1971   Systematics in Prehistory. Free Press, New York.

  1986  Methodological Issues in Americanist Artifact Classification. In Advances in Archaeological Method and Theory, vol. 9, edited by Michael B. Schiffer, pp. 149-207. Academic Press, New York.

  2003  The First New Archaeology and the Development of Chronological Method. In Picking the Lock of Time: Developing Chronology in American Archaeology, edited by James Truncer, pp. 9-21. University Press of Florida.

  2008  Archaeological Things: Languages of Observation. In Time's River: Archaeological Syntheses from the Lower Mississippi River Valley, edited by Janet Rafferty and Evan Peacock, pp. 45-68. University of Alabama Press, Tuscaloosa.

Ford, James A.
  1954  On the Concept of Types: The Type Concept Revisited. American Anthropologist 56: 42-53.

Fox, Gregory L.
  1998  An Examination of Mississippian-Period Phases in Southeastern Missouri. In Changing Perspectives on the Archaeology of the Central Mississippi Valley, edited by Michael J. O’Brien and Robert C. Dunnell, pp. 31-58. University of Alabama Press, Tuscaloosa.

Lyman, R. Lee, and Michael J. O’Brien
  2002  Classification. In Darwin and Archaeology: A Handbook of Key Concepts, edited by John P. Hart and John E. Terrell, pp. 49-68. Bergin and Garvey, Westport.

O’Brien, Michael J.
  2002  A Brief Introduction to Systematics. The Missouri Archaeologist 63: 1-6.

O’Brien, Michael J., and R. Lee Lyman
  2002  The Epistemological Nature of Archaeological Units. Anthropological Theory 2 (1): 37-56.

Spaulding, Albert C.
  1978  Artifact Classes, Association, and Seriation. In Archaeological Essays in Honor of Irving B. Rouse, edited by Robert C. Dunnell and Edwin S. Hall, pp. 27-40. Mouton, The Hague.

Tschauner, Hartmut
  1994  Archaeological Systematics and Cultural Evolution: Retrieving the Honour of Culture History. Man 29: 77-93.