Merge remote-tracking branch 'upstream/master'

1 files changed, 8 insertions, 27 deletions

diff --git a/buch/papers/clifford/references.bib b/buch/papers/clifford/references.bib
index ff829d6..9090005 100644
--- a/buch/papers/clifford/references.bib
+++ b/buch/papers/clifford/references.bib
@@ -4,32 +4,13 @@
 % (c) 2020 Autor, Hochschule Rapperswil
 %
 
-@online{clifford:bibtex,
-	title = {BibTeX},
-	url = {https://de.wikipedia.org/wiki/BibTeX},
-	date = {2020-02-06},
-	year = {2020},
-	month = {2},
-	day = {6}
-}
-
-@book{clifford:numerical-analysis,
-	title = {Numerical Analysis},
-	author = {David Kincaid and Ward Cheney},
-	publisher = {American Mathematical Society},
-	year = {2002},
-	isbn = {978-8-8218-4788-6},
-	inseries = {Pure and applied undegraduate texts},
-	volume = {2}
-}
-
-@article{clifford:mendezmueller,
-        author = { Tabea Méndez and Andreas Müller },
-        title = { Noncommutative harmonic analysis and image registration },
-        journal = { Appl. Comput. Harmon. Anal.},
-        year = 2019,
-        volume = 47,
-        pages = {607--627},
-        url = {https://doi.org/10.1016/j.acha.2017.11.004}
+@article{clifford:hestenes_GA,
+        author = { David Hestenes, Garret Eugene Sobczyk and James S. Marsh },
+        title = { Clifford Algebra to Geometric Calculus. A Unified Language for Mathematics and Physics },
+        journal = { American Journal of Physics },
+        year = 1985,
+        volume = 53,
+        pages = {24},
+        url = {https://www.researchgate.net/publication/258944244_Clifford_Algebra_to_Geometric_Calculus_A_Unified_Language_for_Mathematics_and_Physics}
 }