@book{Rombach, author = {Rombach, H.}, title = {Substanz, System, Struktur. Band 1, M{\"u}nchen (Verlag Karl Alber) 1965.}, language = {de} } @book{Rombach, author = {Rombach, H.}, title = {Substanz, System, Struktur. Band 2, M{\"u}nchen (Verlag Karl Alber) 1966.}, language = {de} } @book{Rombach, author = {Rombach, H.}, title = {Strukturontologie, M{\"u}nchen (Verlag Karl Alber) 1971.}, language = {de} }