Breve og aktstykker vedrørende Johan Ludvig HeibergJohan Ludvig Heiberg, Morten Borup, Danske sprog- og litteraturselskab · First published 1946Open the Tome
Armed InternationalistsMorten Heiberg, Enrico Acciai, Carl-Henrik Bjerström · First published 2025Open the Tome
España y la doctrina del multilateralismo eficazMorten Heiberg, Verónica Puertollano López · First published 2021Open the Tome
New Perspectives on the Spanish Civil War After the End of the Cold WarMorten Heiberg · First published 2008Open the Tome
