@inproceedings{inproceedings76e7815d,
title   = {Change in the cosmic photon to neutrino temperature ratio and primordial nucleosynthesis due plasmons in the early universe},
author = {Opher, M and Opher, Reuven},
year = {1993},
publisher = {Inpe/Fapesp/Finep/Banco do Brasil},
booktitle   = {Encontro Brasileiro de Fisica dos Plasmas}
}