Costanzo, M., B. Cisterna, O. O. Zharskaya, O. V. Zatsepina, and M. Biggiogera. 2011. “Discrete Foci Containing RNAse A Are Found in Nucleoli of HeLa Cells After Aging in Culture”. European Journal of Histochemistry 55 (2), e15. https://doi.org/10.4081/ejh.2011.e15.