BibTex format
@article{BERKSHIRE:1975:10.1007/BF01592940,
author = {BERKSHIRE, FH},
doi = {10.1007/BF01592940},
journal = {PURE AND APPLIED GEOPHYSICS},
pages = {561--568},
title = {CRITICAL LEVELS IN A 3-DIMENSIONAL STRATIFIED SHEAR-FLOW},
url = {http://dx.doi.org/10.1007/BF01592940},
volume = {113},
year = {1975}
}