Name Info Provider Link
subscription/membership/fee required Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S0749-0739(09)00007-8
Carbohydrates free resource MedlinePlus Health Information https://medlineplus.gov/carbohydrates.html
subscription/membership/fee required W.B. Saunders http://journals.elsevierhealth.com/retrieve/pii/S0749-0739(09)00007-8