update

public/content/content.json

@@ -41,7 +41,8 @@
     },
     "links": {
       "demo": "https://covidsta.hft-stuttgart.de/server/",
-      "project":"https://www.hft-stuttgart.com/news/covid-19-dashboard-von-hft-stuttgart-entwickelt"
+      "project":"https://www.hft-stuttgart.com/news/covid-19-dashboard-von-hft-stuttgart-entwickelt",
+      "publication": "https://doi.org/10.5194/isprs-annals-VI-4-W2-2020-135-2020"
     },
     "refIndex": 1
   },