Manuel Duarte Ortigueira, J. A. Tenreiro Machado. What is a fractional derivative?. J. Comput. Physics, 293:4-13, 2015. [doi]
@article{OrtigueiraM15,
title = {What is a fractional derivative?},
author = {Manuel Duarte Ortigueira and J. A. Tenreiro Machado},
year = {2015},
doi = {10.1016/j.jcp.2014.07.019},
url = {http://dx.doi.org/10.1016/j.jcp.2014.07.019},
researchr = {https://researchr.org/publication/OrtigueiraM15},
cites = {0},
citedby = {0},
journal = {J. Comput. Physics},
volume = {293},
pages = {4-13},
}