diff --git a/README.md b/README.md
index df6fa81..9fc8e43 100644
--- a/README.md
+++ b/README.md
@@ -23,4 +23,10 @@ Psion --> rs232 --> max3243cai --> ttl --> Siemens CAB C165 LF --> PCMCIA
 ### ToDo
 * Identify wires
   * First will just continuity test against the max3243
-  * https://hackaday.io/project/161291-the-last-psion/log/157679-striving-for-simplicity-a-psion-serial-honda-to-usb-cable
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+  * https://hackaday.io/project/161291-the-last-psion/log/157679-striving-for-simplicity-a-psion-serial-honda-to-usb-cable
+
+
+### Links
+* https://hackaday.io/project/161291-the-last-psion/log/157679-striving-for-simplicity-a-psion-serial-honda-to-usb-cable
+* https://www.cloudcube.info/2025/03/27/diy-psion-series-5mx-serial-cable-at-a-relatively-low-cost/
+* http://www.ericlindsay.com/epoc/comm3.htm$0
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