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Winner M, Giménez A, Schmidt H, Sontag B, Steffan B, Steglich W (2004). "Unusual pulvinic acid dimers from the common fungi Scleroderma citrinum (common earthball) and Chalciporus piperatus (peppery bolete)". Angewandte Chemie International Edition. 43 (14): 1883–86. Bibcode:2004ACIE...43.1883W. doi:10.1002/anie.200352529. PMID15054803.
Yamada A, Katsua K (1995). "Mycorrhizal associations of isolates from sporocarps and ectomycorrhizas with Pinus densiflora seedlings". Mycoscience. 36 (3): 315–23. doi:10.1007/BF02268607. S2CID85345947.