@article{https://resolver.caltech.edu/CaltechAUTHORS:KOEpr62, title = "Observation of torque exerted by pure superflow", journal = "Physical Review", year = "1962", url = "https://resolver.caltech.edu/CaltechAUTHORS:KOEpr62", id = "record", issn = "0031-899X", doi = "10.1103/PhysRev.125.791", volume = "125" }