You have cited something which is not included in your bibliography

Question

I have the following overleaf project structure:

root
├──IEEEtran.cls
├──IEEEtran.bst
├──Introduction.tex
├──main.tex
├──Related_Work.tex
├──References
   └──refererences.bib

My main.tex file contains the following:

\documentclass[conference]{IEEEtran} 
\usepackage[utf8]{inputenc}
\IEEEoverridecommandlockouts

\usepackage{cite}
\usepackage{amsmath,amssymb,amsfonts}
\usepackage{algorithmic}
\usepackage{graphicx}
\usepackage{textcomp}
\usepackage{xcolor}

\usepackage{booktabs} % For formal tables
\usepackage{multirow}
\usepackage{soul} % for highlights

\def\BibTeX{{\rm B\kern-.05em{\sc i\kern-.025em b}\kern-.08em
    T\kern-.1667em\lower.7ex\hbox{E}\kern-.125emX}}

\begin{document}

\title{Manuscript Title}

\maketitle

\begin{abstract}
   
\end{abstract}
\begin{IEEEkeywords}

\end{IEEEkeywords}

\input{Introduction.tex}
\input{Related_Work}

% Reference list
\bibliographystyle{./IEEEtran}
\bibliography{References/references} 

\end{document}

I have only 2 reference list in References/references.bib

@article{b1,
  title={AMUSE: Empowering users for cost-aware offloading with throughput-delay tradeoffs},
  author={Im, Youngbin and Joe-Wong, Carlee and Ha, Sangtae and Sen, Soumya and Chiang, Mung and others},
  journal={IEEE Transactions on Mobile Computing},
  volume={15},
  number={5},
  pages={1062--1076},
  year={2015},
  publisher={IEEE}
}

@article{b2,
  title={Cooperative data offload in opportunistic networks: From mobile devices to infrastructure},
  author={Lu, Zongqing and Sun, Xiao and La Porta, Thomas},
  journal={IEEE/ACM Transactions on Networking},
  volume={25},
  number={6},
  pages={3382--3395},
  year={2017},
  publisher={IEEE}
}

Nothing in the Introduction.tex file but the heading, only the following in the Related_Work.tex:

\section{Related WOrk}

We refer to the methods in \cite{b1} and \cite{b2}

But the output isn't showing the citations.

Error:

You have cited something which is not included in your bibliography.
Citation 'b1' on page 1 undefined on input line 6

Answer 1

Thanks @Paul for your help. Here's how this was fixed.

a. Deleted the file IEEEtran.bst (which was initially empty, strange).

b. In the main.tex changed:

\bibliographystyle{./IEEEtran}

to:

\bibliographystyle{IEEEtran}