D. Landskron, J. Böhm:
"VMF3/GPT3: refined discrete and empirical troposphere mapping functions";
Journal of Geodesy, 92 (2017), 4; 349 - 360.
http://dx.doi.org/10.1007/s00190-017-1066-2Electronic version of the publication:
http://publik.tuwien.ac.at/files/publik_262647.pdf