Berg Björn, De Anta Rosa Calvo, Escudero Alfonso, Gärdenäs Annemieke, Johansson Maj-Britt, Laskowski Ryszard

, Madeira Manuel, Mälkönen Eino, McClaugherty Charles A., Meentemeyer Vernon, De Santo Amalia Virzo
Canadian Journal of Botany, 1995 vol. 73 no. 9, p. 1423-1435