added sources for lighhouses

bib.bib

@@ -453,3 +453,41 @@
     title = {NPC AI System Based on Gameplay Recordings},
     doi = {10.13140/RG.2.2.23891.89123}
 }
+
+@misc{steam_lighhouse_versions,
+    url = {https://help.steampowered.com/de/faqs/view/1AF1-670B-FF5C-3323},
+    title = {Valve Index Basisstationen & Lighthouse-Ortung},
+    note = {letzter Zugriff 3.3.2022},
+    author = {Steam},
+}
+
+@misc{Buckley_2015,
+    author = {Sean Buckley},
+    url = {https://gizmodo.com/this-is-how-valve-s-amazing-lighthouse-tracking-technol-1705356768},
+    title = {This Is How Valve’s Amazing Lighthouse Tracking Technology Works},
+    note = {letzter Zugriff 3.3.2022},
+    year = {2015},
+}
+
+@misc{Skarredghost_2017,
+    author = {Skarredghost},
+    title = {All you need to know about SteamVR Tracking 2.0… will it be the foundation of Vive 2? },
+    url = {https://skarredghost.com/2017/06/07/need-know-steamvr-tracking-2-0-will-foundation-vive-2/},
+    year = {2017},
+    note = {letzter Zugriff 4.3.2022},
+}
+
+@misc{galaxus_basestation,
+    url = {https://www.galaxus.at/de/s1/product/htc-vive-base-station-vr-zubehoer-5920931?gclid=CjwKCAiApfeQBhAUEiwA7K_UHwANWeWWXH9gNXr-HfhJvymXdR3FpLpnLWU7yHUA9dUT4yFEvVK1JBoCb9AQAvD_BwE&gclsrc=aw.ds},
+    author = {Galaxus},
+    title = {HTC Vive Base Station},
+    note = {letzter Zugriff 4.3.2022},
+}
+
+@misc{Cale_2019,
+    title = {Can you use HTC Vive base stations with Valve Index?},
+    author = {Cale Hunt},
+    year = {2019},
+    note = {Letzter Zugriff 4.3.2022},
+    url = {https://www.windowscentral.com/can-you-use-htc-vive-base-stations-valve-index},
+}