当 bibTex 中某些东西无法正常工作时！

Question

\documentclass[Afour,sageh,times]{sagej}
\setcounter{secnumdepth}{3}
\usepackage{latexsym,amsfonts,amssymb}
\usepackage{amsmath}
\newtheorem{definition}{Definition}
\newtheorem{remark}{Remark}
\newtheorem{theorem}{Theorem}
\newtheorem{corollary}{Corollary}
\newtheorem{lemma}{Lemma}
\newtheorem{proposition}{proposition}
\newtheorem{example}{Example}
\usepackage{moreverb,url}
\usepackage[colorlinks,bookmarksopen,bookmarksnumbered,citecolor=red,urlcolor=red]{hyperref}
\usepackage{subcaption}
\captionsetup[subfigure]{justification=RaggedRight}
\newcommand\BibTeX{{\rmfamily B\kern-.05em \textsc{i\kern-.025em b}\kern-.08em
T\kern-.1667em\lower.7ex\hbox{E}\kern-.125emX}}
\def\volumeyear{2016}
\setcitestyle{aysep={,}}

这是我的.bib 文件：

@inproceedings{flamm2018dual,
    title={Dual Dynamic Programming for Nonlinear Control Problems over Long Horizons},
    author={Flamm, Benjamin and Eichler, Annika and Warrington, Joseph and Lygeros, John},
    booktitle={2018 European Control Conference (ECC)},
    pages={471--476},
    year={2018},
    month={12-15 June 2018},
    address= {Limassol, Cyprus},
    publisher={IEEE}
}

但 PDF 中月份不起作用。

我用

\bibliographystyle{SageH}
\bibliography{refrencesstyle}