 Other important articles from this period include " Elektronische und Instrumentale Musik " ( " Electronic and Instrumental Music " , 1958 , Stockhausen Texte , 1 : 140 – 51 ; Stockhausen 2004 ) , " Musik im Raum " ( " Music in Space " , 1958 , Stockhausen Texte , 1 : 152 – 75 ) , " Musik und Graphik " ( " Music and Graphics " , 1959 , Stockhausen Texte , 1 : 176 – 88 ) , " Momentform " ( 1960 , Stockhausen Texte , 1 : 189 – 210 ) , " Die Einheit der musikalischen Zeit " ( " The Unity of Musical Time " , 1961 , Stockhausen Texte , 1 : 211 – 21 ; Stockhausen 1962 ) , and " Erfindung und Entdeckung " ( " Invention and Discovery " , 1961 , ( Stockhausen Texte , 1 : 222 – 58 ) ) , the last summing up the ideas developed up to 1961 . Taken together , these temporal theories 
