The 1975 Fiat Abarth 031, Fiat 131 Abarth's pre-series racing prototype.
Unknown author<span style="display: none;">Unknown author</span>
Marco Visani (<span class="mw-formatted-date" title="2017-11-18">November 18, 2017</span>). <a rel="nofollow" class="external text" href="https://www.quattroruote.it/news/sport/2017/11/17/rally_le_131_abarth_e_delta_che_vinsero_tutto_.html">Le 131 Abarth e Delta che vinsero tutto</a> <span style="font-size: 0.95em; font-weight: bold; color:#555; position: relative;">(in italian)</span>. <i>quattroruote.it</i>.