TY  - JOUR 
T1  - Identification of a time-varying SIR Model for COVID-19
JO  - Trends in Computational and Applied Mathematics
A1  - HASELEIN, W. M.
A1  - ECKHARD, D.
SN  - 2676-0029
UL  - 10.5540/tcam.2025.026.e01818
VL  - 26 
Y1  - 2025
PB  - Brasil 
ER  -