Add citation information

README.md

@@ -2,7 +2,22 @@
 
 [![Creative Commons Attribution 4.0 International License](https://i.creativecommons.org/l/by/4.0/80x15.png)](http://creativecommons.org/licenses/by/4.0/)
 
-My article "Multiple documents from one source" for the proceedings of the EuroTeX conference 2012.
+My article "Multiple documents from one source" for the [Proceedings of EuroTeX 2012 & 6th ConTeXt Meeting](https://www.ntg.nl/maps/45/).
+
+## BibLaTeX citation
+
+```TeX
+@article{eurotex2012:arnold:uniflow,
+  author        = {Leo Arnold},
+  title         = {Multiple documents from one source},
+  subtitle      = {{\LaTeX} for lecturers and teachers},
+  journal       = {MAPS},
+  volume        = {45},
+  year          = {2012},
+  pages         = {101--106},
+  url           = {https://www.ntg.nl/maps/45/}
+}
+```
 
 ## Download