Palimpsesting

I'm editing my thesis and trying to explain the notion of a 'palimpsestic reading'. This needs to be referenced, hence I resort to Wikipedia, Google Scholar and Salman Rushdie's Imaginary Homelands. Still no definition. The reference is turning into a palimpsest in its own right. Then I turn to articles from a course on world literature undertaken in my undergrad years. More references to Rushdie's The Moor's Last Sigh, Michael Ondaatje's Running in the Family and Shakespeare's Othello. What a parchment! I'm turning it into a digital record.