@misc{indiciaeec643e7b309a, title = {Is there a constancy for velocity?}, author = {S P McKee and L Welch}, year = {1989}, doi = {10.1016/0042-6989(89)90042-4}, url = {https://pubmed.ncbi.nlm.nih.gov/2603393/}, note = {Source identifier: 2603393} }