Evaluating the XP Customer Model and Design by Contract. - Ralph-Johan Back; Piia Hirkman; Luka Milovanov (EUROMICRO, 2004)

Software Process Improvement with Agile Practices in a Large Telecom Company. - Jussi Auvinen; Rasmus Back; Jeanette Heidenberg; Piia Hirkman; Luka Milovanov (PROFES, 2006)

Usability Evaluation of an XP Product. - Tomas Eklund; Franck Tétard; Patrik Ståhl; Piia Hirkman; Barbro Back (ACIS, 2008)

Systematic Piloting of Agile Methods in the Large: Two Cases in Embedded Systems Development. - Jeanette Heidenberg; Mari Matinlassi; Minna Pikkarainen; Piia Hirkman; Jari Partanen (PROFES, 2010)

On the Nature of Supply Chain Management Projects and How to Manage them. - Henrik Johan Nyman; Piia Hirkman (ECIS, 2012)