1. California and Texas took different routes to vaccination: Who's ahead?;California Healthline,2021
2. Understanding the US failure on coronavirus;BMJ,2020
3. Worries grow over GOP reluctance to take vaccines;The Hill,2021
4. Is the federalism the reason for policy failure in Hurricane Katrina?;Publius – The Journal do Federalism,2008
5. Trump finds someone to blame for coronavirus: Andrew Cuomo;Washington Post,2020