Begum, Afroza, et al. “Serum Eosinophilic Cationic Protein (ECP) As an Effective Biological Marker to Monitor Therapy in Bronchial Asthma Patients”. Bangladesh Journal of Medical Microbiology, vol. 5, no. 1, Jan. 2011, pp. 3-7, doi:10.3329/bjmm.v5i1.15813.