TY - RPRT TI - Conservation law for multiple four-wave-mixing processes in a nonlinear optical medium. AU - DL Hart AU - A Judy AU - TA Kennedy AU - R Roy AU - K Stoev PY - 1994 DO - 10.1103/physreva.50.1807 UR - https://pubmed.ncbi.nlm.nih.gov/9911074/ ID - 9911074 ER -