E. C. SITUMORANG, A. PRAMESWARA, H. C. SINTHYA, N. TORUAN-MATHIUS, and T. LIWANG, “Morphology and Histology Identification of Fungal Endophytes from Oil Palm Roots in Ganoderma boninense Endemic Area”, Microbiol indones, vol. 7, no. 4, p. 9, Apr. 2014.