TY - BOOK AU - Osterwalder, Alexander AU - Clark, Tim. AU - AU - Pigneur, Yves. TI - Business model generation: a handbook for visionaries, game changers, and challengers SN - 978-0470-87641-1 U1 - 658.4012 Os85 2010 CY - New York PB - John Wiley & Sons. KW - Business planning--Methodology ER -