This paper is interesting as it seeks to survey the different methods used for procedural content generation and map them the different types of procedurally generated content like assets and texture patterns to story content and gameplay mechanics. The paper goes on to separate these into different layers of content and mentions how technologies and methods used in one category can be applied to another.
This paper is interesting as it paves the ways for new techniques of game and asset design that can be used to create content that was previously difficult or impossible to create.
Hendrikx, M., Meijer, S., Van Der Velden, J. and Iosup, A. (2013). Procedural content generation for games. ACM Transactions on Multimedia Computing, Communications, and Applications, 9(1), pp.1-22.