@articleAlewell_Bähring_Canis_Hauff_Thommes_2007, title=Outsourcing HR functions. Development of an explanatory approach to firms’(non-existent) demand for personnel services, volume=18, number=3, journal=Management Revue, author=Alewell, Dorothea and Bähring, Katrin and Canis, Anne and Hauff, Sven and Thommes, Kirsten, year=2007, pages=271--292 

@articleAlewell_Bähring_Thommes_2005, title=Institutional structures of the flexible assignment of personnel between enterprises. An economic comparison of temporary agency work, interim management and consulting, volume=16, number=4, journal=Management Revue, publisher=Rainer Hampp, author=Alewell, Dorothea and Bähring, Katrin and Thommes, Kirsten, year=2005, pages=475--493