You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'ORDER BY `year`, issue ) QQ WHERE `year`<2100 ORDER BY modified DESC LIMIT 0, 5' at line 1 Bibliographies | Miko Flohr
 

Transportation Research Procaedia

Meeder, M., T. Aebi and U. Weidmann (2017). ‘The influence of slope on walking activity and the pedestrian modal share’. TRP 27: 141–147.