@article{GDZPPN00116550X, title = {The Zeros of Hankel Functions as Functions of Their Order.}, journal = {Numerische Mathematik}, volume = {7}, year = {1965}, pages = {238-250}, zbl = {0145.07503}, url = {http://dml.mathdoc.fr/item/GDZPPN00116550X} }
COCHRAN, J.A. The Zeros of Hankel Functions as Functions of Their Order.. Numerische Mathematik, Tome 7 (1965) pp. 238-250. http://gdmltest.u-ga.fr/item/GDZPPN00116550X/