Linton, F. E. J. (1969). An outline of functorial semantics. In B. Eckmann (Ed.), Seminar on Triples and Categorical Homology Theory (pp. 7–52). Springer Berlin Heidelberg. 
@inproceedings{outline-functorial,
  title = {An outline of functorial semantics},
  author = {Linton, F. E. J.},
  year = {1969},
  booktitle = {Seminar on Triples and Categorical Homology Theory},
  publisher = {Springer Berlin Heidelberg},
  address = {Berlin, Heidelberg},
  pages = {7--52},
  isbn = {978-3-540-36091-9},
  editor = {Eckmann, B.}
}