1. Thomas's structure bundle for conformal, projective and related structures;Bailey;Rocky Mountain J. Math.,1994
2. Differential operators on the base affine space and a study of g-modules;Bernstein,1975
3. Distinguished curves in pseudoconvex boundaries;Burns;Duke Math. J.,1977
4. Differential invariants and curved Bernstein–Gelfand–Gelfand sequences;Calderbank;J. Reine Angew. Math.,2001
5. D.M.J. Calderbank, T. Diemer, V. Souček, Ricci corrected derivatives and invariant differential operators, Edinburgh Preprint MS-00-021, 2000