Ross Street is a major category theorist of the Australian school of category theory?, a student and collaborator of the late Gregory Maxwell Kelly. See his list of publications and homepage. His most important works include works in sheaf, fibred category, stack and descent theory, including the introduction of orientals, a definition of weak higher category, braided categories and quantum groups, Tannaka reconstruction, categorical algebra (e.g. formal theory of monads), bicategories, coherence for tricategories, etc.
R. Street, The algebra of oriented simplexes, J. Pure Appl. Algebra, 49, (1987), 283 – 335.
A. Joyal, R. Street, Pullbacks equivalent to pseudopullbacks, Cahiers topologie et géométrie différentielle catégoriques 34 (1993) 153-156; numdam MR94a:18004.
A. Joyal, R. Street, An introduction to Tannaka duality and quantum groups, Category theory (Como, 1990), 413–492, Lecture Notes in Math. 1488, Springer 1991 (pdf).
A. Joyal, R. Street, The geometry of tensor calculus I, Adv. Math. 88(1991), no. 1, 55–112, doi; Tortile Yang-Baxter operators in tensor categories, J. Pure Appl. Algebra 71 (1991), no. 1, 43–51, doi; Braided tensor categories, Adv. Math. 102 (1993), no. 1, 20–78, doi.
A. Joyal, R. Street, D. Verity, Traced monoidal categories. Math. Proc. Cambridge Philos. Soc. 119 (1996), no. 3, 447–468.