Frontalini, F., D. Curzi, F. Giordano, J. Bernhard, E. Falcieri, and R. Coccioni. “Effects of Lead Pollution on Ammonia Parkinsoniana (foraminifera): Ultrastructural and Microanalytical Approaches”. European Journal of Histochemistry, vol. 59, no. 1, Jan. 2015, doi:10.4081/ejh.2015.2460.