Brazilian Journal of Physics
Brazilian Journal of Physics > 2014 > 44 > 2-3 > 278-282
Brazilian Journal of Physics > 2014 > 44 > 6 > 682-686
Brazilian Journal of Physics > 2014 > 44 > 2-3 > 278-282
Brazilian Journal of Physics > 2014 > 44 > 6 > 682-686