https://wiiw.ac.at/alternatives-in-the-design-of-sovereign-green-bonds-dlp-6412.pdf
https://www.google.com/url?esrc=s&q=&rct=j&sa=U&url=https://www.imf.org/-/media/Files/Publications/WP/2022/English/wpiea2022187-print-pdf.ashx&ved=2ahUKEwiDqLXjvqP9AhXwiP0HHSdXC0UQFnoECAQQAg&usg=AOvVaw3YLIKX-UVfKoiGtiG_7NjZ
https://www.bruegel.org/wp-content/uploads/2022/04/PC-06-1.pdf
https://www.ecb.europa.eu/press/key/date/2021/html/ecb.sp210226~ff6ad267d4.en.html