@techreport{Chang2019,
author = {Chang, W. and Cheng, J. and J.J., Allaire and Xie, Y. and McPherson, J.},
title= {shiny: Web application framework for R. R package version 1.4.0},
year = {2019},
URL = {https://cran.r-project.org/package=shiny},
}