Williams,George2007Williams , G 2007 , ' Cost cutting for success: factors influencing costs ' , Default journal .1646-3730Revista Lusófona de Ciências Aeronáuticasapplication/pdfengopenAccessTRANSPORTES AÉREOSCOMPANHIAS AÉREASINDÚSTRIA AÉREAAIR TRANSPORTAIRLINESAIRLINE INDUSTRYarticlehttp://hdl.handle.net/10437/2625