A sequential relation is a temporal relation in which the event or state of a latter-expressed proposition is communicated to have occurred after the event or state of a prior-expressed proposition.
Longacre, Robert E. 1985. "Sentences as combinations of clauses." In Shopen 1985c
Longacre, Robert E. 1983.The grammar of discourse. New York: Plenum.
Halliday, M. A. K., and Ruqaiya Hasan. 1976.Cohesion in English. London: Longman.