I'm trying to cite two different papers that share the same author and were published in the same year. Here is an example:
\documentclass{article}
\usepackage[ backend=biber,
style=authoryear,
sorting=nyt,
useprefix=true,
sortlocale=de_DE,
natbib=true,
doi=false,
isbn=false,
maxcitenames=2,
maxbibnames=99,
eprint=false]
{biblatex}
\usepackage{filecontents}
\begin{filecontents*}{general.bib}
@article{giacometti16a,
author = "Giacometti, R. and Zavala, J.A. and Gog, L.",
year = {2016},
pages = {68-77},
title = {Anthropogenic increase in carbon dioxide modifies plant–insect interactions},
journal = {Annals of Applied Biology},
volume={170},
number={1},
doi = {10.1111/aab.12319}
}
@article{giacometti16b,
author = "Giacometti, R. and Barneto, J. and Barriga, L. G and Sardoy, P.M. and Balestrasse, K. and Andrade, A.M and Pagano, E.A and Alemano, S.G and Zavala, J.A.",
title = {Early perception of stink bug damage in developing seeds of field-grown soybean induces chemical defences and reduces bug attack},
journal = {Pest Management Science},
volume = {72},
number = {8},
pages = {1585-1594},
keywords = {herbivory, jasmonic acid, MAPK signalling, plant–insect interactions, salicylic acid, Glycine max L, Nezara viridula L},
doi = {10.1002/ps.4192},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/ps.4192},
eprint = {https://onlinelibrary.wiley.com/doi/pdf/10.1002/ps.4192},
year = {2016}
}
@article{thomma01,
title = "The complexity of disease signaling in Arabidopsis",
journal = "Current Opinion in Immunology",
volume = "13",
number = "1",
pages = "63 - 68",
year = "2001",
issn = "0952-7915",
doi = "https://doi.org/10.1016/S0952-7915(00)00183-7",
url = "http://www.sciencedirect.com/science/article/pii/S0952791500001837",
author = "Thomma, B.P and Penninckx, I.A. and Cammue, C.P. and Broekaert, W.F.",
keywords = "Arabidopsis thaliana, salicylic acid, jasmonic acid, ethylene, biotroph, necrotroph",
abstract = "Not more than 10 years ago it was generally accepted that pathogen-inducible defense mechanisms in plants are triggered through a central signaling cascade that regulates a multicomponent defense response. Now we know that the plant defense system is regulated through a complex network of various signaling cascades."
}
\end{filecontents*}
\addbibresource{general.bib}
\nocite{*}
\begin{document}
As is saying in \parencite{giacometti16a}, \parencite{giacometti16b} and in \parencite{thomma01}
\printbibliography
\end{document}
And this is how latex make my pdf:
As you may have noticed, when two paper share the same author and year, biblatex cites the first and second author (Giacomettis´s references)
But I don't want to differentiate these twins references that way, I want only the first author to be cited and then the year with a letter "a" for the first paper and with a letter "b" for the second paper. Here is an example:
Does anyone know how can I fix this issue?


uniquelist=falseto yourbiblatexoptions. Do you also want to remove et al.? You have removed it for Giacometti, but left it in for Thomma. – David Purton Mar 18 '19 at 23:52uniquelist=falseas suggested by David and explained in https://tex.stackexchange.com/q/69028/35864 should help you. – moewe Mar 19 '19 at 11:53