N. Feld

Mycoplasma hyopneumoniae infection in pigs: duration of the disease and evaluation of four diagnostic assays.

N. E. Jensen, V. Bille-Hansen, P. Ahrens, 1997, Veterinary microbiology.

A monoclonal blocking ELISA detecting serum antibodies to Mycoplasma hyopneumoniae.

P. Qvist, P. Ahrens, N. Feld, 1992, Veterinary microbiology.