@article{articleaffdb661,
title   = {Relation between the hemagglutination inhibition test and the indirect elisa in the serologic monitoring of laying hens submitted to different systems of vaccination against newcastle disease},
author = {Richtzenhain, Leonardo José and Paulillo, Antonio Carlos and Pinto, Aramis Augusto and Kronka, Sergio Nascimento},
year = {1993},
journal   = {Revista de Microbiologia}
}