diff --git a/thesis.bib b/thesis.bib
index b57bfee..8cb167f 100644
--- a/thesis.bib
+++ b/thesis.bib
@@ -1496,14 +1496,15 @@ URL: https://elib.dlr.de/54309/1/Lokalisierungsverfahren_v22.pdf},
   qualityassured = {qualityAssured},
 }
 
-@Misc{beacon_library_2021,
-  title   = {{A}ndroid {B}eacon {L}ibrary},
-  year    = {2021},
-  comment = {Calculating Formula Constants: https://altbeacon.github.io/android-beacon-library/distance-calculations2.html
-https://docs.google.com/spreadsheets/d/1ymREowDj40tYuA5CXd4IfC4WYPXxlx5hq1x8tQcWWCI/edit#gid=0},
-  groups  = {Verwendet},
-  url     = {https://github.com/AltBeacon/android-beacon-library},
-  urldate = {2021-12-21},
+@Misc{RadiusNetworks_2021,
+  author         = {{Radius Networks}},
+  title          = {{C}alculating {F}ormula {C}onstants},
+  year           = {2021},
+  file           = {:distance-calculations2.html:URL},
+  groups         = {Verwendet},
+  qualityassured = {qualityAssured},
+  url            = {https://altbeacon.github.io/android-beacon-library/distance-calculations2.html},
+  urldate        = {2021-12-21},
 }
 
 @Article{Paterna_2017,
@@ -1548,7 +1549,7 @@ https://docs.google.com/spreadsheets/d/1ymREowDj40tYuA5CXd4IfC4WYPXxlx5hq1x8tQcW
   comment        = {https://ub-deposit.fernuni-hagen.de/receive/mir_mods_00001418},
   doi            = {10.18445/20180824-220948-0},
   file           = {:Diss_Lategahn_Kartenbasierte_Lokalisierung_2018.pdf:PDF},
-  groups         = {Algorithmen},
+  groups         = {Algorithmen, Thesis von anderen},
   keywords       = {Ortsbestimmung; Positionierung; Geb{\"a}udekarten; Topologische Karten; Kalman-Filter; Smartphone; Bluetooth Low Energy; Pedestrian Dead Reckoning; Sequenzielle Monte-Carlo-Methode},
   priority       = {prio1},
   publisher      = {FernUniversit{\"a}t Hagen},
@@ -1573,6 +1574,78 @@ Zitat: Antennen abstrahlcharakteristik!},
   urldate        = {2022-01-20},
 }
 
+@Book{Traenkler_2014_BOOK,
+  editor         = {Hans-Rolf Tränkler and Leo Reindl},
+  publisher      = {Springer Berlin Heidelberg},
+  title          = {Sensortechnik},
+  year           = {2014},
+  isbn           = {978-3-642-29941-4},
+  month          = feb,
+  series         = {VDI-Buch},
+  doi            = {10.1007/978-3-642-29942-1},
+  ean            = {9783642299414},
+  file           = {:2014_Book_Sensortechnik.pdf:PDF},
+  groups         = {Verwendet},
+  qualityassured = {qualityAssured},
+  subtitle       = {Handbuch für Praxis und Wissenschaft},
+}
+
+@Misc{beacon_library_2021,
+  title   = {{A}ndroid {B}eacon {L}ibrary},
+  year    = {2021},
+  comment = {Calculating Formula Constants: https://altbeacon.github.io/android-beacon-library/distance-calculations2.html
+https://docs.google.com/spreadsheets/d/1ymREowDj40tYuA5CXd4IfC4WYPXxlx5hq1x8tQcWWCI/edit#gid=0},
+  groups  = {Verwendet},
+  url     = {https://github.com/AltBeacon/android-beacon-library},
+  urldate = {2021-12-21},
+}
+
+@Misc{jcgm_2008,
+  title          = {{E}valuation of measurementdata — {S}upplement 1 to the \“{G}uide to the expression ofuncertainty in measurement\” —{P}ropagation of distributionsusing a {M}onte {C}arlo method},
+  year           = {2008},
+  comment        = {https://www.bipm.org/en/committees/jc/jcgm/publications},
+  file           = {:JCGM_101_2008_E.pdf:PDF},
+  groups         = {Verwendet},
+  key            = {JCGM 101:2008},
+  number         = {JCGM 101},
+  qualityassured = {qualityAssured},
+  ranking        = {rank5},
+  type           = {Norm},
+  url            = {https://www.bipm.org/en/committees/jc/jcgm/publications},
+}
+
+@Misc{jcgm_2012,
+  note           = {Erstveröffentlichung 2008},
+  title          = {{I}nternational vocabulary ofmetrology – {B}asic and generalconcepts and associated terms ({VIM})},
+  year           = {2012},
+  comment        = {https://www.bipm.org/en/committees/jc/jcgm/publications},
+  file           = {:JCGM_200_2012.pdf:PDF},
+  groups         = {Verwendet},
+  key            = {JCGM 200:2012},
+  number         = {JCGM 200:2012},
+  priority       = {prio1},
+  qualityassured = {qualityAssured},
+  ranking        = {rank5},
+  type           = {Norm},
+  url            = {https://www.bipm.org/en/committees/jc/jcgm/publications},
+  volume         = {3},
+}
+
+@Book{Heilmann_2020_BOOK,
+  author         = {Rolf Heilmann},
+  publisher      = {Springer Fachmedien Wiesbaden},
+  title          = {{R}auschen in der {S}ensorik},
+  year           = {2020},
+  isbn           = {978-3-658-29213-3},
+  month          = mar,
+  comment        = {https://www.ebook.de/de/product/38468474/rolf_heilmann_rauschen_in_der_sensorik.html},
+  doi            = {10.1007/978-3-658-29214-0},
+  ean            = {9783658292133},
+  file           = {:Heilmann2020_Book_RauschenInDerSensorik.epub:ePUB;:Heilmann2020_Book_RauschenInDerSensorik.pdf:PDF},
+  groups         = {Verwendet},
+  qualityassured = {qualityAssured},
+}
+
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