@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/