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Conservatoire botanique national des Pyrénées et de Midi-Pyrénées

Rumsey, F.J., Vogel, J., Russell, S.J., Barrett, J.A., Gibby, M., 1999 . Population structure and conservation biology of the endangered fern Trichomanes speciosum Willd. (Hymenophyllaceae) at its northern distributional limit. Biological Journal of the Linnean Society, 66(3) : 333-344.