DNA immunization with plasmids encoding fusion and nucleocapsid proteins of bovine respiratory syncytial virus induces a strong cell-mediated immunity and protects calves against challenge., Boxus, Mathieu, Tignon Marylène, Roels S., Toussaint Jean-François, Walravens Karl, Benoit Marie-Ange, Coppe Philippe, Letesson Jean-Jacques, Letellier Carine, and Kerkhofs Pierre , J Virol, 2007 Jul, Volume 81, Issue 13, p.6879-89, (2007)