1. Sharp GC, Irvin WS, Tan EM, Gould RG, Holman HR. Mixed connective tissue disease – an apparently distinct rheumatic disease syndrome associated with a specific antibody to an extractable nuclear antigen (ENA). Am J Med1972;52:148–59.
2. Sharp GC. Diagnostic criteria for classification of MCTD. In: Kasukawa R, Sharp GC, eds. Mixed connective tissue diseases and antinuclear antibodies. Amsterdam: Elsevier, 1987:23–32.
3. Kasukawa R, Tojo T, Miyawaki S. Preliminary diagnostic criteria for classification of mixed connective tissue disease. In: Kasukawa R, Sharp GC, eds. Mixed connective tissue diseases and antinuclear antibodies. Amsterdam: Elsevier, 1987:41–7.
4. Smolen JS, Steiner G. To be or not to be? Arthritis Rheum1998;41:768–77.
5. Nedumaram, Rajendram CP, Porkodi R, Parthiban R. Mixed connective tissue disease – clinical and immunological profile. J Assoc Physicians India2001;49:412–14.