@misc{indiciae7d5b93c7da40, title = {Projection-operator method for the nonlinear three-wave interaction.}, author = {AM Martins and JT Mendonça}, year = {1985}, doi = {10.1103/physreva.31.3898}, url = {https://pubmed.ncbi.nlm.nih.gov/9895972/}, note = {Source identifier: 9895972} }