1. Clubbing, a review, with emphasis on hereditary acropachy;Fischer;Medicine,1964
2. New-onset clubbing associated with lung cancer;Faller;N Engl J Med,2008
3. Hippocratic Writings;Hippocrates,1978
4. Finger clubbing: validity as a physical sign;Pyke;Lancet,1954
5. Quantitation of digital clubbing in children;Waring;Am Rev Respir Dis,1971