Please add the first reference here, then space for more will pop up.
If possible, follow this style: Büttner, B.; Kinigadner, J.; Ji., C.; Wright, B.; Wulfhorst, G. (2018): The TUM Accessibility Atlas: Visualizing Spatial and Socioeconomic Disparities in Accessibility to Support Regional Land-Use and Transport Planning. In: Networks and Spatial Economics, January 2018, Pages 1-30.