@article{article51e34d25,
title   = {Conformal invariance and non-universality in quantum spin chains with a defect},
author = {Guimaraes, L. G. and Felício, José Roberto Drugowich de},
year = {1986},
doi = {10.1088/0305-4470/19/6/008},
journal   = {Journal of Physics A}
}