http://burks.brighton.ac.uk/burks/pcinfo/progdocs/plbook/imperati.htm The Imperative Programming Paradigm
http://www-106.ibm.com/developerworks/library/l-pyth7.html ocaml continuation Charming Python: Inside Python's implementations Interviews with the creators of Vyper and Stackless Python
http://www.cl.cam.ac.uk/~gmb/Papers/vanilla-xml2003.html Xen XML API language Programming with Circles, Triangles and Rectangles