http://es.wikipedia.org/wiki/Joseph_Anton_Steffan

Steffan, Joseph Anton

Štěpán, Joseph Anton

Stephan, Joseph Anton

Steffani, Giuseppe Antonio

Stephani, Giuseppe Antonio

Concerto in D, 1959---port. (Josef Antonín Štěpán) p. VII (also Giuseppe Antonio Stefan, Steffan and Stephan; was born at Kopidlno in Bohemia)

WWW Grove Music Online, 8-3-2012---(Štěpán, Josef Antonín; 1726-1797; Steffan/Stephan, Joseph Anton; Steffani/Stephani, Giuseppe Antonio; Czech composer, keyboard teacher and virtuoso, active in Austria)