@article{articlebb06df6f, title = {Ultrastructural differences among mast cells of several organs of the american opossum ( didelphis-azarac , marsupialia )}, author = {Soares, J. C and Ferreira, A L and Vugman, Ithamar and Goncalves, R P}, year = {1988}, journal = {Arquivos de Anatomia Y Embriologia} }