diff --git a/README.md b/README.md
index f0bb108..dcd40de 100644
--- a/README.md
+++ b/README.md
@@ -54,4 +54,5 @@ Some of the papers that you may want to cite when using `timflow` are:
   * M. Bakker. 2013. Semi-analytic modeling of transient multi-layer flow with TTim.
   Hydrogeology Journal, 21: 935-943. [https://doi.org/10.1007/s10040-013-0975-2](https://doi.org/10.1007/s10040-013-0975-2)
   * M .Bakker. 2013. Analytic modeling of transient multi-layer flow. In: Advances in
-  Hydrogeology, edited by P Mishra and K Kuhlman, Springer, Heidelberg, 95-114.
+  Hydrogeology, edited by P Mishra and K Kuhlman, Springer, Heidelberg, 95-114. Available [here](https://github.com/mbakker7/timflow/blob/master/papers/2013_bakker_ttim_theory.pdf).
+
diff --git a/docs/transient/00userguide/howtos/howto_convert_ttim_model.ipynb b/docs/transient/00userguide/howtos/howto_convert_ttim_model.ipynb
index 48501e5..03e6891 100644
--- a/docs/transient/00userguide/howtos/howto_convert_ttim_model.ipynb
+++ b/docs/transient/00userguide/howtos/howto_convert_ttim_model.ipynb
@@ -24,7 +24,7 @@
     "\n",
     "and you don't want to make any other changes to your model, then replace the import statement by\n",
     "\n",
-    "```from timflow import transiewnt as ttim```\n",
+    "```from timflow import transient as ttim```\n",
     "\n",
     "or, if you like that better\n",
     "\n",
diff --git a/papers/2013_bakker_ttim_theory.pdf b/papers/2013_bakker_ttim_theory.pdf
new file mode 100755
index 0000000..71ba8cc
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