Serkan, Samut, and Rahmi Yamak. “Did the Covid-19 Pandemic Affect the Relationship Between Trading Volume and Return Volatility in the Cryptocurrencies?”. Public Finance Quarterly, vol. 66, no. 4, Dec. 2021, https://journals.lib.uni-corvinus.hu/index.php/penzugyiszemle/article/view/1222.