Orzechowski, A. 2019. Analysis of the Impact of Maintaining and Changing Credit Ratings on the Credit Spread on the Polish Corporate Bond Market in the Period 2010–2017. Krakow Review of Economics and Management/Zeszyty Naukowe Uniwersytetu Ekonomicznego w Krakowie. 6(978) (Apr. 2019), 23–39. DOI:https://doi.org/10.15678/ZNUEK.2018.0978.0602.