They are articles published in regular subscription medical and scientific journals that you can access for free at a university library. Or if you belong to a university then you can access them on-line. Most of the reliable research information on FM and FODMAPs are found in these journals. Once in a while the author of these articles will post them on their institutional web site such as the Gibson and Shepherd article - the second reference in my signature - and you can get them without a subscription or going to a university library. Otherwise due to copyright restrictions you have to get them from a source such as a university library that subscribes to these journals or buy them on-line.
The first reference in my signature was written by a dietitian with knowledge about FM and FODMAPs. It is quite good. Although she says citrus fruits such as oranges & grapefruits contain polyols which is not confirmed in the references I listed in the previous message. There maybe polyols in the skins but they are not ingested.
-------------------- STABLE: ♂, IBS-D 50+ years - Science of IBS