PhD Thesis

Pentti Virtanen: Measuring and Improving Component-Based Software Development, University of Turku, April 2003.

Licentiate Thesis

Pentti Virtanen: Issues of Improving Object-Oriented Software Development, University of Turku, January 2000.

Conference Proceedings

Pentti Virtanen: Object Component Process Metrics - A new approach to software project estimation, In Proceedings of the 21th Information Systems Research seminar in Scandinavia, volume 2, page(s) 919-937, Department of Computer Science, Aalborg University, 1998.
Pentti Virtanen: An Evaluation of the Benefits of Object Oriented Methods in Software Development Processes, In Serge Demeyer, Jan Bosch (eds), Workshop Reader of the 12th European Conference of Object-Oriented Programming, Lecture Notes in Computer Science, page(s) 35-36, Springer, 1998.

Pentti Virtanen: Extended Reuse with Verb Inheritance -- A New Approach to Software Construction and Reuse, In Frank Gerhardt and Luigi Benedicenti and Erik Ernst (eds), Position Papers from the 8th Workshop for PhD Students in Object-Oriented Systems, page(s) 147--154, Department of Computer Science, University of Åårhus, Denmark, 1999.
Pentti Virtanen: Adaptability - The enabler of Reuse, In Timo K. Käkölä (eds), Proceedings of the 22th Information Systems Research Seminar in Scandinavia (IRIS22): Enterprice Architechtures for Virtual Organisations, volume 3, page(s) 353-370, University Of Jyväskylä, August 1999.

Pentti Virtanen: Component Reuse Metrics - Assessing Human Effects, In Katarina Maxwell, Rob Kusters, Erik van Veenendaal, Adrian Cowderoy (eds), Proceedings of the combined 11th European Software Control and Metrics Conference and the 3rd SCOPE Conference on Software Product Quality, page(s) 171-179, Shaker Publishing, April 2000.
Pentti Virtanen: Verb Classes - Design for Reuse, In Helmut Thoma, Heinrich C. Mayer, Alptekin Erkollar (eds), 6th International Conference on Re-Technologies for Information Systems - Preparin to E-business, page(s) 155-166, Österreichishe Computer Gesellschaft, March 2000.

Pentti Virtanen: Empirical Study Evaluating Component Reuse Metrics, In Katarina Maxwell, Serge Oligny, Rob Kusters, and Erik van Veenendaal (eds), Proceedings of the 12th European Software Control and Metrics Conference, page(s) 125-135, Shaker Publishing, April 2001.