Cowan, M. A. (1961-01-01). "Nummular eczema. A review, follow-up and analysis of a series of 325 cases". Acta Dermato-Venereologica. 41: 453–460. PMID13881857. आइ॰एस॰एस॰एन॰0001-5555.
Cowan, M. A. (1961-01-01). "Nummular eczema. A review, follow-up and analysis of a series of 325 cases". Acta Dermato-Venereologica. 41: 453–460. PMID13881857. आइ॰एस॰एस॰एन॰0001-5555.