A. J. Mohd Adnan, T. A. Imran, and Z. Lambak, “COUPLING RESPONSES TOWARDS WAVELENGTH AND COUPLING GEOMETRIES FOR SYMMETRIC AND ASYMMETRIC DIRECTIONAL COUPLERS”, Solid State Sci. Technol., vol. 15, no. 2, pp. 60–65, Apr. 2026, doi: 10.66514/.