TY - RPRT TI - When does the diffusion approximation fail to describe photon transport in random media? AU - KM Yoo AU - F Liu AU - RR Alfano PY - 1990 DO - 10.1103/physrevlett.64.2647 UR - https://pubmed.ncbi.nlm.nih.gov/10041774/ ID - 10041774 ER -