Cocker, J. M., Webster, M. A., Li, J., Wright, J., Kaithakottil, G., Swarbreck, D., & Gilmartin, P. M. (2015). Oakleaf: An S locus‐linked mutation of Primula vulgaris that affects leaf and flower development. New Phytol.

Cocker, Jonathan M., Margaret A. Webster, Jinhong Li, Jonathan Wright, Gemy Kaithakottil, David Swarbreck, ja Philip M. Gilmartin. "Oakleaf: An S Locus‐linked Mutation of Primula Vulgaris That Affects Leaf and Flower Development." New Phytol 2015.

Cocker, Jonathan M., et al. "Oakleaf: An S Locus‐linked Mutation of Primula Vulgaris That Affects Leaf and Flower Development." New Phytol 2015.