diff --git a/doc/d-utils.md b/doc/d-utils.md
index bf70f2b..0724989 100644
--- a/doc/d-utils.md
+++ b/doc/d-utils.md
@@ -437,3 +437,119 @@ sent to the address stored within.
 
 Sends email using mail(1) command. The arguments ```#:to``` and
 ```#:subject``` are mandatory. Argument ```#:from``` is optional.
+
+## util-bst [module]
+
+    (import util-bst)
+
+Binary Search Tree implementation
+
+### make-bst [procedure]
+
+    (make-bst subtag
+              EQ?
+              <?)
+
+Creates empty BST with given comparators
+
+### (bst? subtag) [procedure]
+
+    ((bst? v)
+           subtag)
+
+Curried predicate for particular bst type.
+
+### bst-empty? [procedure]
+
+    (bst-empty? bst)
+
+Returns #t if given BST is empty.
+
+### bst-ref [procedure]
+
+    (bst-ref bst
+             k
+             . vs)
+
+Retrieves value associated with given key.
+
+### bst-contains? [procedure]
+
+    (bst-contains? bst
+                   k)
+
+Predicate for key existence in BST.
+
+### bst-set [procedure]
+
+    (bst-set bst
+             k
+             v)
+
+Sets given key to given value and updates count if needed.
+
+### bst-remove [procedure]
+
+    (bst-remove bst
+                k
+                . nos)
+
+Removes given key from the BST.
+
+### bst-keys [procedure]
+
+    (bst-keys bst)
+
+Returns all the keys contained in given dictionary.
+
+### bst-balance [procedure]
+
+    (bst-balance bst)
+
+Unconditionally balances the BST.
+
+### bst-find-pair [procedure]
+
+    (bst-find-pair bst
+                   pred?)
+
+Finds pair by predicate that accepts both key and value.
+
+### bst-filter-pairs [procedure]
+
+    (bst-filter-pairs bst
+                      pred?)
+
+Returns a list of key-value pairs matching predicate.
+
+### bst-map-list [procedure]
+
+    (bst-map-list bst
+                  proc)
+
+Returns arbitrary list created by mapping all elements.
+
+### bst-map-bst [procedure]
+
+    (bst-map-bst bst
+                 proc)
+
+Returns a new dictionary with all values processed (keys are left intact).
+
+### list->bst [procedure]
+
+    (list->bst lst
+               subtag
+               EQ?
+               <?)
+
+Converts list of pairs into BST dictionary.
+
+### bst-update [procedure]
+
+    (bst-update bst
+                k
+                proc
+                (v #f))
+
+
diff --git a/src/Makefile b/src/Makefile
index 319866d..e0648c1 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -62,13 +62,14 @@ GENDOC-SOURCES=gendoc.scm duck-extract.import.scm			\
 	util-io.import.scm util-stdout.import.scm			\
 	util-parser.import.scm util-list.import.scm			\
 	util-proc.import.scm util-format.import.scm			\
-	util-tag.import.scm util-string.import.scm
+	util-tag.import.scm util-string.import.scm			\
+	util-bst.import.scm
 
 GENDOC-OBJS=gendoc.o duck-extract.o util-time.o util-csv.o util-io.o	\
 	progress.o testing.o util-proc.o util-git.o util-io.o		\
 	util-stdout.o util-parser.o util-list.o util-proc.o		\
 	util-format.o racket-kwargs.o util-dict-list.o util-tag.o	\
-	util-set-list.o duck.o util-string.o
+	util-set-list.o duck.o util-string.o util-bst.o
 
 .PHONY: imports
 imports: $(HACKERBASE-DEPS)
@@ -518,7 +519,8 @@ DUCK-EXTRACT-SOURCES=duck-extract.scm util-proc.import.scm
 duck-extract.o: duck-extract.import.scm
 duck-extract.import.scm: $(DUCK-EXTRACT-SOURCES)
 
-UTIL-BST-SOURCES=util-bst.scm util-tag.import.scm testing.import.scm
+UTIL-BST-SOURCES=util-bst.scm util-tag.import.scm testing.import.scm	\
+	duck.import.scm
 
 util-bst.o: util-bst.import.scm
 util-bst.import.scm: $(UTIL-BST-SOURCES)
diff --git a/src/gendoc.scm b/src/gendoc.scm
index 07f904a..8a29521 100644
--- a/src/gendoc.scm
+++ b/src/gendoc.scm
@@ -32,4 +32,5 @@
 	  util-tag
 	  util-string
 	  util-mail
+	  util-bst
 	  )