diff --git a/bibliography.bib b/bibliography.bib
index 5adca629..6e4872a0 100644
--- a/bibliography.bib
+++ b/bibliography.bib
@@ -23,3 +23,68 @@
   date = {2014-01},
   file = {Full Text:/home/me/Zotero/storage/PFXP8NLV/Zhang et al. - 2014 - Building a Scalable System for Stealthy P2P-Botnet.pdf:application/pdf}
 }
+
+@incollection{kim_survey_2012,
+  location = {Dordrecht},
+  title = {A Survey on P2P Botnet Detection},
+  volume = {120},
+  isbn = {978-94-007-2910-0 978-94-007-2911-7},
+  url = {http://link.springer.com/10.1007/978-94-007-2911-7_56},
+  pages = {589--593},
+  booktitle = {Proceedings of the International Conference on {IT} Convergence and Security 2011},
+  publisher = {Springer Netherlands},
+  author = {Han, Kyoung-Soo and Im, Eul Gyu},
+  editor = {Kim, Kuinam J. and Ahn, Seong Jin},
+  urldate = {2021-11-11},
+  date = {2012},
+  doi = {10.1007/978-94-007-2911-7_56},
+  note = {Series Title: Lecture Notes in Electrical Engineering},
+  file = {Full Text:/home/me/Zotero/storage/CMFWF58V/Han and Im - 2012 - A Survey on P2P Botnet Detection.pdf:application/pdf}
+}
+
+@online{statista_iot_2020,
+  title = {Number of Internet of Things (IoT) Connected Devices Worldwide from 2019 to 2030},
+  organization = {Statista Inc.},
+  publisher = {Transforma Insights},
+  date = {2020-12},
+  url = {https://www.statista.com/statistics/1183457/iot-connected-devices-worldwide/},
+  urldate = {2021-11-11}
+}
+
+@online{statista_broadband_2021,
+  title = {Availability of broadband internet to households in Germany from 2017 to 2020, by bandwidth class},
+  organization = {Statista Inc.},
+  publisher = {BMVI},
+  date = {2021-08-16},
+  url = {https://www.statista.com/statistics/460180/broadband-availability-by-bandwidth-class-germany/},
+  urldate = {2021-11-11}
+}
+
+@online{ars_ddos_2016,
+  title = {Brace yourselves --- source code powering potent IoT DDoSes just went public},
+  date = {2016-10-02},
+  author = {Dan Goodin},
+  organization = {Ars Technica},
+  url = {https://arstechnica.com/information-technology/2016/10/brace-yourselves-source-code-powering-potent-iot-ddoses-just-went-public/},
+  urldate = {2021-11-11},
+  archiveurl = {http://example.com},
+  archivedate = {2021-11-11},
+}
+
+@article{fan_p2p_2014,
+  title = {A P2P Botnet Detection Method Used On-line Monitoring and Off-line Detection},
+  volume = {8},
+  issn = {17389976, 17389976},
+  url = {http://article.nadiapub.com/IJSIA/vol8_no3/10.pdf},
+  doi = {10.14257/ijsia.2014.8.3.10},
+  pages = {87--96},
+  number = {3},
+  journaltitle = {International Journal of Security and Its Applications},
+  shortjournal = {{IJSIA}},
+  author = {Fan, Yuhui and Xu, Ning},
+  urldate = {2021-11-11},
+  date = {2014-05-31},
+  file = {Full Text:/home/me/Zotero/storage/7UI2IFIL/Fan and Xu - 2014 - A P2P Botnet Detection Method Used On-line Monitor.pdf:application/pdf}
+}
+
+/* vim: set filetype=bib ts=2 sw=2 tw=0 et :*/
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diff --git a/references/2014-a_p2p_botnet_detection_method_used_on-line_monitoring_and_off-line_detection.pdf b/references/2014-a_p2p_botnet_detection_method_used_on-line_monitoring_and_off-line_detection.pdf
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