Roca, F.; Bravo, M.A. (1993). The occurrence of Xiphinema sphaerocephalum Lamberti et al. and X. hispanum Lamberti et al. (Nematoda: Longidoridae) in Portugal with descriptions of X. lanceolatum sp. n. and X. lapidosum sp. n. Fundamental and Applied Nematology. 16: 455-465.
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Roca, F.; Bravo, M.A.
1993
The occurrence of Xiphinema sphaerocephalum Lamberti et al. and X. hispanum Lamberti et al. (Nematoda: Longidoridae) in Portugal with descriptions of X. lanceolatum sp. n. and X. lapidosum sp. n.