1. Evaluation of Tabarie's formula;Alvarez-Nazario;Journal of the Association of Official Analytical Chemists,1982
2. European Brewery Convention;Analytica-EBC,1998
3. Analysis and quality control;Anger,2009
4. Wine analysis;Applegate,1993
5. Specific gravity and degrees Plato of sugar solutions or per cent extract by weight – table 1 and Relationship between specific gravity at 20°C/20°C and alcohol content of mixtures of ethyl alcohol and water – table 2;ASBC,1940