1. G.S. Agarwal, E. Wolf Calculus for functions of noncommuting operators and general phase-space methods in quantum mechanics I Phys.Rev. D 2 (1970), 2161–2186
2. F. Bayen, M. Flato, C. Fronsdal, A. Lichnerowicz, D. Sternheimer Deformation theory and quantization I Ann.Phys. 111 (1978), 61–110
3. R.Bott in: Lectures on algebraic and differential topology Springer Lect.Notes in Math., vol.279
4. H. Daughaday, B.P. Nigam Function in quantum mechanics which corresponds to a given function in classical mechanics Phys.Rev. 139 B (1965), 1436–1442
5. M. Flato, A. Lichnerowicz, D. Sternheimer Crochet de Moyal-Vey et quantification C.R.Acad.Sc.Paris, sér.A A 283 (1976) 19–24