\documentclass[a4paper,12pt]{scrartcl}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}

\usepackage[raiselinks=true,
            bookmarks=true,
            bookmarksopenlevel=1,
            bookmarksopen=true,
            bookmarksnumbered=true,
            breaklinks,
            hyperindex=true,
            plainpages=false,
            pdfpagelabels=true,
            pdfborder={0 0 0.5}]{hyperref}

\usepackage[
natbib,
backend=biber,
style=alphabetic,
citestyle=authoryear
]{biblatex}
\addbibresource{bibliography.bib}

\begin{document}
Reference sentences are too often Lorem Ipsum \parencites[p. 345]{alice}[p. 123]{bob}
\end{document}