HOLÉCY, Ján. On the utility function of forestry as the important source of externalities. In ŠULEK, Rastislav - HERICH, Martin. The forest - economy versus ecology : the forum of young scientific on the role of the forest in the third millenium society : international scientific conference. - Zvolen : Technical University in Zvolen, 2001. ISBN 80-228-1040-1, p. 57-64.