DOE:10.5547/2160-5890.1.2.4
DOE:10.5547/2160-5890.1.3.5
DOE:10.5547/2160-5890.5.2.shou
DOE:10.5547/01956574.34.1.4
DOE:10.5547/01956574.35.3.4
DOE:10.5547/01956574.37.3.kgil
DOE:10.5547/01956574.37.4.aper
DOE:10.5547/ISSN0195-6574-EJ-Vol33-No1-2