Hirschmann, J. V.; Lawlor, F.; English, J. S.; Louback, J. B.; Winkelmann, R. K.; Greaves, M. W. Cholinergic urticaria. A clinical and histologic study. Archives of Dermatology. 1987, 123 (4): 462–467. PMID 3827277. doi:10.1001/archderm.1987.01660280064024.
Hirschmann, J. V.; Lawlor, F.; English, J. S.; Louback, J. B.; Winkelmann, R. K.; Greaves, M. W. Cholinergic urticaria. A clinical and histologic study. Archives of Dermatology. 1987, 123 (4): 462–467. PMID 3827277. doi:10.1001/archderm.1987.01660280064024.