M. Ryhänen

发表

Performance of Finnish dairy farms and its determinants: A comparison of parametric, semiparametric, and nonparametric methods

T. Sipiläinen, S. Ovaska, Mika Kortelainen, 2009 .

Technical change in Finnish grass silage production

T. Sipiläinen, M. Ryhänen, 2008 .