What are the recent studies on the independence number and covering number of graph products and graph powers? Please suggest some good recent article in this area.
You can see the studies and relevant results on various parameters of different products of certain graph classes in the following book. These are very nice books consisting of comprehensive studies on different graph products.
1. W. Imrich and S. Klavzar, Product Graphs: Structure and Recognition, Wiley (2000).
2. R. Hammack, W. Imrich and S. Klavzar, Handbook of Product Graphs, CRC Press (2011).