@inbook{0c056000ce7d40f5b125e08eb038efb3,
title = "Variation theory: an organizing principle to guide design research in education",
keywords = "design research, research in education, variation theory",
author = "Mona Holmqvist and Laila Gustavsson and Anna Wernberg",
year = "2008",
language = "English",
isbn = "978-0-8058-6058-0",
pages = "111--130",
editor = "Kelly and A.E. and Lesh and R.A. and Baeck and J.Y.",
booktitle = "Handbook of design research methods in education",
publisher = "Routledge",
address = "United States",
}