F. Shirini, S. V. Atghia, and M. Mamaghani, “Sulfonic acid-functionalized ordered nanoporous Na+-montmorillonite as an efficient, eco-benign, and water-tolerant nanoreactor for chemoselective oxathioacetalization of aldehydes”, Int. Nano Lett., vol. 3, no. 1 (December 2013), Jan. 2013, doi: 10.1186/2228-5326-3-3.