@article{ryosuke2022trend,
author = {Harakawa, Ryosuke and Ito, Tsutomu and Iwahashi, Masahiro},
year = {2022},
title = {Trend clustering from COVID-19 tweets using graphical lasso-guided iterative principal component analysis},
journal = {Scientific Reports},
volume={12},
number={5709},
doi = {10.1038/s41598-022-09651-6}
}