DOE:10.4319/lo.1966.11.4.0650 DOE:10.4319/lo.2008.53.4.1217 DOE:10.4319/lo.2009.54.1.0368 DOE:10.4319/lo.2009.54.3.0653 DOE:10.4319/lo.2009.54.3.0666 DOE:10.4319/lo.2009.55.2.0492 DOE:10.4319/lo.2011.56.3.0841 DOE:10.4319/lo.2012.57.1.0076 DOE:10.4319/lo.2013.58.4.1271 DOE:10.4319/lo.2013.58.4.1513 DOE:10.4319/lo.2014.59.3.0689 DOE:10.4319/lom.2010.8.363 DOE:10.4319/lom.2010.8.661 DOE:10.4319/lom.2012.10.90 DOE:10.4319/lom.2012.10.681 DOE:10.4319/lom.2014.12.407