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2. Vialli, M., and Erspamer, V., Arch. di Fisiol., 40, 239 (1940).
3. Erspamer, V., Acta pharmacol., 4, 213 (1948).
4. Erspamer, V., Arch. int. Pharmacodyn., 74, 113 (1947); ibid., 76, 308 (1948).
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