1. Eastin IL, Shook SR, Fleishman SJ (2001) Material substitution in the US residential construction industry, 1994 versus 1998. Forest Prod J 51:30–37
2. Wagner ER, Hansen EN (2004) A method for identifying and assessing key customer group needs. Ind Market Manag 33:643–655
3. Anon (1998) Wood as a building material. A qualitative study-Denmark. Job no. 980901. Research International Norway, Oslo
4. Broman NO (1996) Two methods for measuring people’s preferences for Scots pine wood surfaces: a comparative multivariate analysis. Mokuzai Gakkaishi 42:130–139
5. Ahlmark D (1977) Substitute and competition — a study of product differentiation based on material properties (Swedish). Research report 6069. Ekonomiska forskningsinstitutet vid Handelshögskolan i Stockholm, EFI, Stockholm