1. Our Common Future: Report of the World Commission on Environment and Development;Brundtland,1987
2. Humanity Will Have Exhausted on August 1st All Renewable Resources Corresponding to 2018https://thecostaricanews.com/humanity-will-have-exhausted-on-august-1st-all-renewable-resources-corresponding-to-2018/
3. From Today We Live on Ecological Debt, Consumption and Food Waste are Growinghttps://www.zenyvmeste.sk/od-dnes-zijeme-na-ekologicky-dlh--rastie-spotreba-a-plytvanie
4. Earth Overshoot Day″: From Today, the Earth Lives on Credithttps://www.sbs.com.au/language/english/earth-overshoot-day-from-today-the-earth-lives-on-credit
5. High Consumption of Fertilizers Threatens Slovak Soilhttps://euractiv.sk/section/potravinarstvo/news/vysoka-spotreba-hnojiv-ohrozuje-slovensku-podu/