diff --git a/notas/_quarto.yml b/notas/_quarto.yml
index fd13690..70b518a 100644
--- a/notas/_quarto.yml
+++ b/notas/_quarto.yml
@@ -6,6 +6,7 @@ book:
   author: "Felipe González"
   chapters:
     - index.qmd
+    - 01-introduccion.qmd
 bibliography: referencias/book.bib
 
 format:
diff --git a/notas/referencias/book.bib b/notas/referencias/book.bib
index 6870286..5f23059 100755
--- a/notas/referencias/book.bib
+++ b/notas/referencias/book.bib
@@ -214,17 +214,14 @@ @book{koller2009
 }
 
 @book{rethinking,
-  added-at = {2020-03-30T17:12:59.000+0200},
-  author = {McElreath, Richard},
-  biburl = {https://www.bibsonomy.org/bibtex/278338fb3be3f2c65e8309f4875299b90/kirk86},
-  description = {Statistical_Rethinking_sample.pdf},
-  interhash = {7b9e77b5b345deaa1fa27ce3c419e424},
-  intrahash = {78338fb3be3f2c65e8309f4875299b90},
-  keywords = {book stats},
-  timestamp = {2020-03-30T17:15:46.000+0200},
-  title = {Statistical Rethinking, A Course in R and Stan},
-  url = {http://xcelab.net/rmpubs/rethinking/Statistical_Rethinking_sample.pdf},
-  year = 2015
+  title={Statistical Rethinking: A Bayesian Course with Examples in R and Stan},
+  author={McElreath, R.},
+  isbn={9780367139919},
+  lccn={2019957006},
+  series={A Chapman \& Hall book},
+  url={https://books.google.com.mx/books?id=Ie2vxQEACAAJ},
+  year={2020},
+  publisher={CRC Press}
 }
 
 @article{Pearl2022gb,
diff --git a/renv.lock b/renv.lock
index b87abf7..e330465 100644
--- a/renv.lock
+++ b/renv.lock
@@ -311,6 +311,17 @@
       ],
       "Hash": "3243218410e169c5515ef8933cbba546"
     },
+    "coda": {
+      "Package": "coda",
+      "Version": "0.19-4",
+      "Source": "Repository",
+      "Repository": "RSPM",
+      "Requirements": [
+        "R",
+        "lattice"
+      ],
+      "Hash": "24b6d006b8b2343876cf230687546932"
+    },
     "colorspace": {
       "Package": "colorspace",
       "Version": "2.1-0",
@@ -971,6 +982,20 @@
       ],
       "Hash": "b8552d117e1b808b09a832f589b79035"
     },
+    "loo": {
+      "Package": "loo",
+      "Version": "2.6.0",
+      "Source": "Repository",
+      "Repository": "RSPM",
+      "Requirements": [
+        "R",
+        "checkmate",
+        "matrixStats",
+        "parallel",
+        "stats"
+      ],
+      "Hash": "e5c8f41731502a0e98f353da23f7ca30"
+    },
     "lubridate": {
       "Package": "lubridate",
       "Version": "1.9.3",
@@ -1071,6 +1096,17 @@
       ],
       "Hash": "6dfe8bf774944bd5595785e3229d8771"
     },
+    "mvtnorm": {
+      "Package": "mvtnorm",
+      "Version": "1.2-4",
+      "Source": "Repository",
+      "Repository": "RSPM",
+      "Requirements": [
+        "R",
+        "stats"
+      ],
+      "Hash": "17e96668f44a28aef0981d9e17c49b59"
+    },
     "nlme": {
       "Package": "nlme",
       "Version": "3.1-163",
@@ -1325,6 +1361,32 @@
       ],
       "Hash": "d66fe009d4c20b7ab1927eb405db9ee2"
     },
+    "rethinking": {
+      "Package": "rethinking",
+      "Version": "2.40",
+      "Source": "GitHub",
+      "RemoteType": "github",
+      "RemoteHost": "api.github.com",
+      "RemoteRepo": "rethinking",
+      "RemoteUsername": "rmcelreath",
+      "RemoteRef": "HEAD",
+      "RemoteSha": "f3ac8de0b4bcfabccc67ed033fb81d1873ec755e",
+      "Requirements": [
+        "MASS",
+        "R",
+        "cmdstanr",
+        "coda",
+        "graphics",
+        "loo",
+        "methods",
+        "mvtnorm",
+        "parallel",
+        "posterior",
+        "shape",
+        "stats"
+      ],
+      "Hash": "9caed73679267a4b22d50a3dc49f219a"
+    },
     "rlang": {
       "Package": "rlang",
       "Version": "1.1.2",
@@ -1434,6 +1496,19 @@
       ],
       "Hash": "3838071b66e0c566d55cc26bd6e27bf4"
     },
+    "shape": {
+      "Package": "shape",
+      "Version": "1.4.6",
+      "Source": "Repository",
+      "Repository": "RSPM",
+      "Requirements": [
+        "R",
+        "grDevices",
+        "graphics",
+        "stats"
+      ],
+      "Hash": "9067f962730f58b14d8ae54ca885509f"
+    },
     "stringi": {
       "Package": "stringi",
       "Version": "1.7.12",