https://repository.lsu.edu/gradschool_theses/742/
"Louisiana State University nasalance protocol standardization" by Kathryn Ruth Kendrick
It was the purpose of this study to obtain nasalance values using the Nasometer and a resonance evaluation created at the Louisiana State University (LSU)...
louisiana state universityprotocolstandardizationkathrynruth
https://experts.colorado.edu/display/pubid_381898
Nasalance and the Tenor Passaggio | CU Experts | CU Boulder
and thetenorpassaggiocuexperts