\documentclass[]{article}
\usepackage[style=authoryear-icomp,
natbib=true,
url=false,
doi=false,
isbn=false,
backend=biber,
bibstyle=numeric,
maxbibnames=1,
mincitenames=1,
maxcitenames=1]{biblatex}
\DeclareNameAlias{author}{last-first}
\bibliography{Bibliography}
\begin{document}
Text \citep{Eliasson1991, Bravi2017}
\input{Reference/Bibliography}
\printbibliography
\end{document}
my bibliography.bib:
@article{Eliasson1991,
author = {Eliasson, Ann-Christin and Gordon, Andrew M and Forssberg, Hans},
doi = {10.1111/j.1469-8749.1991.tb14943.x},
isbn = {0012-1622 (Print)},
issn = {14698749},
journal = {Developmental Medicine {\&} Child Neurology},
keywords = {Cerebral Cortex,Cerebral Cortex: physiopathology,Cerebral Palsy,Cerebral Palsy: diagnosis,Cerebral Palsy: physiopathology,Child,Hemiplegia,Hemiplegia: diagnosis,Hemiplegia: physiopathology,Humans,Isometric Contraction,Isometric Contraction: physiology,Motor Neurons,Motor Neurons: physiology,Motor Skills,Motor Skills: physiology,Neurologic Examination,Neurologic Examination: instrumentation,Psychomotor Performance,Pyramidal Tracts,Pyramidal Tracts: physiopathology},
month = {nov},
number = {8},
pages = {661--670},
pmid = {1916022},
title = {{Basic Coordination of Manipulative Forces of Children With Cerebral Palsy}},
url = {http://doi.wiley.com/10.1111/j.1469-8749.1991.tb14943.x},
volume = {33},
year = {1991}
}
@article{Bravi2017,
author = {Bravi, Riccardo and Cohen, Erez J. and Martinelli, Alessio and Gottard, Anna and Minciacchi, Diego},
doi = {10.3389/fnint.2017.00021},
issn = {1662-5145},
journal = {Frontiers in Integrative Neuroscience},
keywords = {augmented feedback,human motor control,laterality of motor control,sensorimotor integration,timing of action},
month = {sep},
pages = {21},
publisher = {Frontiers},
title = {{When Non-Dominant Is Better than Dominant: Kinesiotape Modulates Asymmetries in Timed Performance during a Synchronization-Continuation Task}},
url = {http://journal.frontiersin.org/article/10.3389/fnint.2017.00021/full},
volume = {11},
year = {2017}
}
I have two problems with this:
(1) The citation names appear more than 1, I need only one and followed by et.al (first picture)
(2) The citation names for Eliasson for example include the first name (A.C) but another citation do not - see other citation. I dont know why this happens? I only need the last name like the others. 
(3) I do not like the reference style (second picture). how can i change to nature style: (Author. Journal title. Journal 21, 557–62 (2011).)


biblatexis done through the command\addbibresource{xxxx.bib}. – Bernard Aug 13 '18 at 11:22uniquelist=falsehttps://tex.stackexchange.com/q/69028/35864, (2) looks likeuniquename=falsehttps://tex.stackexchange.com/q/134535/35864. For (3) you might want to have a look at https://ctan.org/pkg/biblatex-nature – moewe Aug 13 '18 at 11:39biblatex-natureinstalled? There are more elegant ways to count the items in a bibliography than a numeric style and I firmly believe that the number of items in the bibliography is not correlated with the quality of a scientific work - at least not in a way that would make it useful to count the number of items when evaluating the merit of the work. And if someone thinks the number of bibliography items is a useful metric, they should have to count them themselves. – moewe Aug 13 '18 at 11:59Package biblatex Error: Bibliography m acro 'cite' undefined.
– Sharah Aug 13 '18 at 12:03