Schnetzler, G., and C. Roberts. “Invasive Aspergillosis: Is Treatment With "inexpensive" Amphotericin B Cost Saving If ‘expensive’ Voriconazole Is Only Used on Demand?”. Swiss Medical Weekly, vol. 136, no. 3940, Oct. 2006, pp. 624-, doi:10.4414/smw.2006.11259.