Fluorescence in situ hybridization with rdna probes on chromosomes of two nucleolus organizer region phenotypes of a species of eigenmannia ( pisces, gymnotoidei, sternopygidae) - Almeida-Toledo, Lurdes Foresti de; Stocker, A J; Foresti, F; Toledo Filho, Sílvio de Almeida (Chromosome Research, 1996)