@article{articleb33218af,
title   = {Are ''teta' POT. +' and the Roper resonance diquark-diquerak-antiquark states?},
author = {Matheus, R D and Navarra, Fernando Silveira and Nielsen, Marina and Silva, R Rodrigues da and Lee, S H},
year = {2004},
journal   = {Physics Letter B}
}