@misc{indiciae98d95ebee289, title = {Two-photon geometric optics.}, author = {TB Pittman and DV Strekalov and DN Klyshko and MH Rubin and AV Sergienko and YH Shih}, year = {1996}, doi = {10.1103/physreva.53.2804}, url = {https://pubmed.ncbi.nlm.nih.gov/9913196/}, note = {Source identifier: 9913196} }