6Collins M T. Tttrbinate perimeter ratio as indicator of conchal atrophy for diagnosis of atrophic rhitis in pigs [J]. Am J Vet Res, 1989, 50(3): 421-424.
7Done J T. Atrophic rhinitis: snout morphometry for quunttitative assessment of chonchal atrophy [J] . Vet Rec, 1984, 114: 33-35.
8斯特劳 B E,阿莱尔 S D,蒙加林 W L,等.猪病学(第8版)[M].沈建忠主译.北京:中国农业大学出版社,2000.