@ARTICLE{
author={Skipina Blanka,Petronijevic Ivan M,Luyt Adriaan S,Dojcinovic Biljana P,Duvenhage MM,Swart HC,Suljovrujic Edin H,Dudic Dusko A},
year={2020},
title={Ionic diffusion in iPP: DC electrical conductivity},
journal={SURFACES AND INTERFACES},
volume={21},
number={},
pages={-},
document_type={Article},
} 

@ARTICLE{
author={Dankelmann P,Gutman Ivan,Mukwembi S,Swart HC},
year={2009},
title={On the degree distance of a graph},
journal={DISCRETE APPLIED MATHEMATICS},
volume={157},
number={13},
pages={2773-2777},
document_type={Article},
} 

@ARTICLE{
author={Dankelmann P,Gutman Ivan,Mukwembi S,Swart HC},
year={2009},
title={The edge-Wiener index of a graph},
journal={DISCRETE MATHEMATICS},
volume={309},
number={10},
pages={3452-3457},
document_type={Article},
}