1. C. W. Scheele , Kongliga Svenska Vetenskaps Akademiens Handlingar , 1785 , vol. 6 , pp. 17–27 (in Swedish)
2. An English translation may be found in, The Collected Papers of Carl Wilhelm Scheele , ed. L. Dobbins , Bell and Sons , London , 1931 , pp. 267–275
3. The Origin of the Names Malic, Maleic, and Malonic Acid
4. P. Groth , Chemische Krystallographie , Engelmann , Leipzig , 1910 , vol. 3 , p. 290
5. Structure of (–)-malic acid