TY  - JOUR 
T1  - KLOBUCHAR AND NEQUICK G IONOSPHERIC MODELS COMPARISON FOR MULTI-GNSS SINGLE-FREQUENCY CODE POINT POSITIONING IN THE BRAZILIAN REGION
JO  - Boletim de Ciências Geodésicas
A1  - Setti Júnior, Paulo de Tarso
A1  - Alves, Daniele Barroca Marra
A1  - Silva, Crislaine Menezes da
SN  - 1982-2170
UL  - 10.1590/s1982-21702019000300016
VL  - 25 
Y1  - 2019
PB  - Brasil 
ER  -