Wohlert, Claus. The rise of Swedish multinational companies. The rise of Swedish multinational companies : a case study against the background of direct investment theories : Alfa-Laval and the separator industry 1876-1914. 1981 [4 Sep 2022]. (原始内容存档于2022-09-02).
Wohlert, Claus. The rise of Swedish multinational companies. The rise of Swedish multinational companies : a case study against the background of direct investment theories : Alfa-Laval and the separator industry 1876-1914. 1981 [4 Sep 2022]. (原始内容存档于2022-09-02).