By Richard P. Stanley and John R. Stembridge. Journal of Combinatorial Theory, SeriesA62,261–279. Author-hosted primary article: math.mit.edu/~rstan/pubs/pubfiles/87.pdf
§1, equation(1.1), defines the Jacobi-Trudi matrix and its Schur determinant. §3, printed page270, explicitly fixes the unsigned forgotten-function convention, in contrast to the signed convention used by some sources.