Scala, A., Comparini, C., Cecere, L., & Capretti, P. (2000). Multiple Forms of Pectin-Degrading Enzymes Produced by Intersterile Groups P, S and F of «Heterobasidion annosum» (Fr.) Bref. Phytopathologia Mediterranea, 39(3), 376–388. https://doi.org/10.14601/Phytopathol_Mediterr-1577