TY - DATA AU - S.I. Andersson AU - H.-D. Doebner TI - Non-linear Partial Differential Operators and Quantization Procedures T2 - Lecture Notes in Mathematics SN - 9783540386957 PY - 1983/// CY - Heidelberg PB - Springer Berlin KW - Mathematics and Statistics UR - https://doi.org/10.1007/BFb0073167 ER -