Huber, Robert A.; Jankowski, Michael; Juen, Christina-Marie (2022-12-05). «Populist parties and the two-dimensional policy space». European Journal of Political Research (Wiley) 62 (3): 989–1004. doi:10.1111/1475-6765.12569. ISSN0304-4130.
Huber, Robert A.; Jankowski, Michael; Juen, Christina-Marie (2022-12-05). «Populist parties and the two-dimensional policy space». European Journal of Political Research (Wiley) 62 (3): 989–1004. doi:10.1111/1475-6765.12569. ISSN0304-4130.