Møller, A P Coevolutionary arms races: increased host immune defense promotes specialization by avian fleas. [electronic resource] - Journal of evolutionary biology Jan 2005 - 46-59 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 1010-061X Standard No.: 10.1111/j.1420-9101.2004.00774.x doi Subjects--Topical Terms: AnimalsBiological EvolutionBirds--immunologyHost-Parasite InteractionsImmunity, CellularSiphonaptera--pathogenicityT-Lymphocytes--immunology