In English
Articles:
Hannu Virtanen & Leealaura Leskelä (2010): Plain Language in Finland
Markus Itkonen: Typography and readability
Heli Numminen: Memory and reading
Hannu Virtanen: Concept book, Selkouutiset and LL-Bladet
Sami Älli & Kimmo Kyyhkynen: Guidelines for the design of a plain language web service
Plain Language in Finland (2007)
Groups that use plain language
Estimated size of reader groups
The principles of plain language
Plain Language Centre and cooperation in the field