diff --git a/README.md b/README.md
index a009a15..61a77d7 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ Alpha software under development.
 * SciAps XRF Analyzer
 
 
-# Notes
+# Deep Learning Algorithm
 Can use lots from `wut`.
 
 * https://spacecruft.org/spacecruft/satnogs-wut/src/branch/master/wut-worker-mas.py#L67-L79
@@ -49,7 +49,18 @@ Can use lots from `wut`.
 Amazingly (to me), the paper
 *Classification of radioxenon spectra with deep learning algorithm*
 (2021) by Azimi, et al. uses nearly the identical CNN `Sequence()` as
-`wut` uses, indicating it may be a very good base to start from (!!!).
+`wut` uses, indicating it may be a very good base to start from.
+
+Paper is non-gratis science:
+
+* https://www.sciencedirect.com/science/article/abs/pii/S0265931X21001909
+
+
+The `Sequence()` diagram is pulled from the Azimi paper, but is the
+same as in `wut`, so makes a good reference.
+
+
+![Deep Learning Sequence](img/ml-sequence.png)
 
 
 Will likely work best with binary categorizations. E.g. like this:
@@ -58,6 +69,7 @@ Is it element B or not element B?
 Is it element C or not element C?
 Not "is it element A, B, or C?" 
 
+
 # Unofficial
 Unofficial, unaffiliated with SciAps.
 
diff --git a/img/sequence.png b/img/sequence.png
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index 0000000..6ade14b
Binary files /dev/null and b/img/sequence.png differ