Obiedat, Hamed M. “A Topological Characterization of the Beurling-Björck Space 𝔖𝜔 Using the Short-Time Fourier Transform”. CUBO, A Mathematical Journal, vol. 8, no. 2, Aug. 2006, pp. 33-45, https://cubo.ufro.cl/index.php/cubo/article/view/1602.