Russell, J R., Hosein, F., Johnson, E., Van Der Ven, W T G., Waugh, R. and Powell, W.
Publisher: Baradat, P., W. T. Adams and G. Mueller-Starck (Ed.). Population genetics and genetic conservation of forest trees; International Symposium, Carcans-Maubuisson, France, 24-28 August, 1992. SPB Academic Publishing bv, p. 135-138.