Ross, J. A., Severson, R. K., Swensen, A. R., Pollock, B. H., Gurney, J. G., & Robison, L. L. (1999). Seasonal variations in the diagnosis of childhood cancer in the United States. Nature Publishing Group.

Ross, J A., R K. Severson, A R. Swensen, B H. Pollock, J G. Gurney, und L L. Robison. Seasonal Variations in the Diagnosis of Childhood Cancer in the United States. Nature Publishing Group, 1999.

Ross, J A., et al. Seasonal Variations in the Diagnosis of Childhood Cancer in the United States. Nature Publishing Group, 1999.