Journal of Fluid Mechanics 35(4), 721–735 (10 March 1969). Exact publisher bylines B. J. Bellhouse and L. Talbot, Department of Engineering Science, Oxford University. Abstract: a rigid-walled valve model in a pulsatile water tunnel exhibited a sinus stagnation point and trapped vortex, with most closure occurring while net flow was still forward. The 2006 publisher date is online publication of the historical article, not the experimental year.
Publisher Author details additionally gives L. Talbot a permanent address at the University of California, Berkeley, while listing the Oxford Department of Engineering Science affiliation. The primary author names remain B. J. Bellhouse and L. Talbot; no full initials expansion or individual division of experimental work is inferred.