@article{article706b978a,
title   = {XX:XY sex chromosome system with X heterochromatinization: an early stage of sex chromosome differentiation in the neotropic electric eel Eigenmannia virescens},
author = {Almeida-Toledo, Lurdes Foresti de and Foresti, Fausto and Pequignot, E V and Daniel-Silva, Maria de Fátima Zambelli},
year = {2001},
doi = {10.1159/000057020},
journal   = {Cytogenetics and Cell Genetics}
}