Lönnerholm, G.; Knutson, L.; Wistrand, P. J.; Flemström, G. (1989). “Carbonic anhydrase in the normal rat stomach and duodenum and after treatment with omeprazole and ranitidine”. Acta Physiologica Scandinavica136 (2): 253–262. doi:10.1111/j.1748-1716.1989.tb08659.x. PMID2506730.
Lönnerholm, G.; Knutson, L.; Wistrand, P. J.; Flemström, G. (1989). “Carbonic anhydrase in the normal rat stomach and duodenum and after treatment with omeprazole and ranitidine”. Acta Physiologica Scandinavica136 (2): 253–262. doi:10.1111/j.1748-1716.1989.tb08659.x. PMID2506730.