Since there are no comments on the OPs blog, I will just post this here: http://www.infoq.com/presentations/programming-abstraction-liskov http://www.infoq.com

Since there are no comments on the OPs blog, I will just post this here: http://www.infoq.com/presentations/programming-abstraction-liskov http://www.infoq.com/presentations/programming-abstraction-l... http://www.youtube.com/watch?v=ymF94cFfzUQ http://www.youtube.com/watch?v=ymF94cFfzUQ