In addition to writing numerous articles in philatelic journals, Diena wrote in great detail on stamps of Modena, Romagna, Sicily, Parma, and Naples during the 1920s and 1930s.
Emilio Estevez | Emilio Aguinaldo | Emilio Aguinaldo College | John D'Emilio | Emílio Santiago | Emilio González Márquez | Emilio Cruz | Emilio Vedova | Emilio Gentile | Emilio Ambasz | Emilio Salgari | Emilio Pucci | Emilio Lussu | Emilio Gnutti | Emilio Cavallini | Carlo Emilio Gadda | Paolo Emilio Taviani | Jorge Emilio González Martínez | Emilio Vilà | Emilio Terry | Emilio Jacinto | Emilio García Riera | Emilio Gamboa Patrón | Emilio Elizalde | Emilio de Villota | Emilio Aragón Bermúdez | Diena | ''"Madonna del Velo" with Cardinal Paolo Emilio Sfondrati'', c. 1591 (Wilanów Palace | Leah D'Emilio | Juan Emilio O'Leary |