Rieger, J., B. Drewes, H. Hünigen, and J. Plendl. “Mucosubstances in the Porcine Gastrointestinal Tract: Fixation, Staining and Quantification”. European Journal of Histochemistry, vol. 63, no. 2, June 2019, doi:10.4081/ejh.2019.3030.