Missing Method in ProductsController

Error: The action Volver a la página anterior. is not defined in controller ProductsController

Error: Create ProductsController::Volver a la página anterior.() in file: www.cromoly.com/controllers/products_controller.php.

<?php
class ProductsController extends AppController {

	var $name = 'Products';


	function Volver a la página anterior.() {

	}

}
?>

Notice: If you want to customize this error message, create www.cromoly.com/views/errors/missing_action.ctp.