Trujillo, Javier Garcia-Gasco; de Toca, Alvaro Noval Sanchez; Ortego, Ignacio Montesinos; Gonzalez, Jose Manuel Fernandez; Perez, Manuel Sierra . (2013). Design and Implementation of a Quasi-Orthogonal Switching Beam-Former for Triangular Arrays of Three Radiating Elements. IEEE Transactions on Antennas and Propagation, 61(10), 5028–5035.
doi:10.1109/TAP.2013.2272674