by James R.L, Dumroese R.K
Published in Colloques de l' INRA (France). no. 68 (1994)

by Camporota P, Perrin R
Published in Colloques de l' INRA (France). no. 68 (1994)

by Rigling D, Heiniger U
Published in Colloques de l' INRA (France). no. 68 (1994)

by Genere B, Verger S
Published in Colloques de l' INRA (France). no. 68 (1994)

by Prochazkova Z
Published in Colloques de l' INRA (France). no. 68 (1994)

by Ferreira M.C
Published in Colloques de l' INRA (France). no. 68 (1994)