Obliquely related, the shortest paper title I am aware of: H=W. By Norman G. Meyers and James Serrin, Proceedings of the National Academy of Science 51 (1964),

Obliquely related, the shortest paper title I am aware of: H=W. By Norman G. Meyers and James Serrin, Proceedings of the National Academy of Science 51 (1964), 1055–1056.