TY  - RPRT
TI  - Helicity-Density And Normalized-Helicity Maps Of Flows
AU  - Degani, David
AU  - Levy, Yuval
AU  - Seginer, Arnan
PY  - 1991
UR  - https://ntrs.nasa.gov/citations/19910000386
ID  - 19910000386
ER  -