https://doi.org/10.1016/s0144-8617(02)00107-8
https://doi.org/10.1016/j.carbpol.2011.04.085
https://doi.org/10.1016/j.carbpol.2022.120239
https://doi.org/10.1016/j.carbpol.2004.09.010
https://doi.org/10.1016/j.carbpol.2005.09.004
https://doi.org/10.1016/j.carbpol.2016.09.070
https://doi.org/10.1016/j.carbpol.2015.06.096
https://doi.org/10.1016/j.carbpol.2013.07.043
https://doi.org/10.1016/j.carbpol.2017.04.093
https://doi.org/10.1016/j.carbpol.2016.11.025
https://doi.org/10.1016/j.carbpol.2013.08.091
https://doi.org/10.1016/j.carbpol.2017.05.036
https://doi.org/10.1016/j.carbpol.2011.09.070
https://doi.org/10.1016/j.carbpol.2009.10.012
https://doi.org/10.1016/j.carbpol.2020.117366
https://doi.org/10.1016/j.carbpol.2020.116033
https://doi.org/10.1016/j.carbpol.2011.11.020
https://doi.org/10.1016/j.carbpol.2015.10.008
https://doi.org/10.1016/j.carbpol.2010.09.019
https://doi.org/10.1016/s0144-8617(99)00184-8
https://doi.org/10.1016/j.carbpol.2004.01.007
https://doi.org/10.1016/j.carbpol.2014.04.100
https://doi.org/10.1016/j.carbpol.2011.09.015
https://doi.org/10.1016/j.carbpol.2020.117249
https://doi.org/10.1016/j.carbpol.2020.116530
https://doi.org/10.1016/j.carbpol.2016.02.004
https://doi.org/10.1016/j.carbpol.2010.02.033
https://doi.org/10.1016/j.carbpol.2013.04.036
https://doi.org/10.1016/j.carbpol.2018.12.026
https://doi.org/10.1016/j.carbpol.2012.12.002
https://doi.org/10.1016/j.carbpol.2020.116746
https://doi.org/10.1016/j.carbpol.2019.115214
https://doi.org/10.1016/j.carbpol.2018.04.017
https://doi.org/10.1016/j.carbpol.2015.03.078
https://doi.org/10.1016/j.carbpol.2013.05.062
https://doi.org/10.1016/0144-8617(95)00122-0
https://doi.org/10.1016/0144-8617(85)90038-4
https://doi.org/10.1016/j.carbpol.2019.115216
https://doi.org/10.1016/0144-8617(92)90093-6
https://doi.org/10.1016/j.carbpol.2018.04.045
https://doi.org/10.1016/j.carbpol.2011.12.015
https://doi.org/10.1016/j.carbpol.2013.01.089
https://doi.org/10.1016/s0144-8617(96)00152-x
https://doi.org/10.1016/j.carbpol.2018.07.026
https://doi.org/10.1016/j.carbpol.2011.04.018
https://doi.org/10.1016/j.carbpol.2017.01.100
https://doi.org/10.1016/j.carbpol.2008.02.016
https://doi.org/10.1016/j.carbpol.2014.09.010
https://doi.org/10.1016/j.carbpol.2007.07.020
https://doi.org/10.1016/s0144-8617(96)00124-5
https://doi.org/10.1016/j.carbpol.2016.02.022
https://doi.org/10.1016/j.carbpol.2011.11.076
https://doi.org/10.1016/j.carbpol.2015.11.005
https://doi.org/10.1016/j.carbpol.2019.115662
https://doi.org/10.1016/j.carbpol.2022.120328
https://doi.org/10.1016/j.carbpol.2007.11.028
https://doi.org/10.1016/j.carbpol.2018.12.013
https://doi.org/10.1016/j.carbpol.2014.02.070
https://doi.org/10.1016/j.carbpol.2022.120157
https://doi.org/10.1016/0144-8617(91)90018-8
https://doi.org/10.1016/j.carbpol.2017.08.091
https://doi.org/10.1016/j.carbpol.2011.02.039
https://doi.org/10.1016/j.carbpol.2014.08.043
https://doi.org/10.1016/j.carbpol.2017.06.056