add docs

docs/doc.bib

@@ -0,0 +1,17 @@
+@ARTICLE{harel:sta,
+    AUTHOR   = "David Harel",
+    TITLE    = "Statecharts: {A} {V}isual {F}ormalism for {C}omplex {S}ystems",
+    PAGES    = "231--274",
+    JOURNAL  = "Science of Computer Programming",
+    VOLUME   = "8",
+    NUMBER   = "3",
+    YEAR     = "1987"
+    }
+
+@BOOK{samek:psc,
+    AUTHOR    = "Miro Samek",
+    TITLE     = "Practical Statecharts in C/C++: Quantum Programming for Embedded Systems",
+    PUBLISHER = "CMP Books",
+    YEAR      = "2002",
+    ISBN      = "1578201101",
+    }