Agile processes in software engineering and extreme programming [Electronic resource] : 12th international conference, XP 2011, Madrid, Spain, May 10-13, 2011 : proceedings / ed. A. Sillitti [et al.]. - Electronic text data. - Berlin ; Heidelberg : Springer, 2011. - (Lecture notes in business information processing, ISSN 1865-1348 ; 77). - ISBN 978-3-642-20677-1 : Б. ц.