Jagadeeswaran, P., Forget, B. G. and Weissman, S. M. (1981). Short interspersed repetitive DNA elements in eucaryotes: transposable DNA elements generated by reverse transcription of RNA pol III transcripts? Cell 26: 141-142
Nisson, P. E., Hickey, R. J., Boshar, M. F. and Crain, W. R. (1988). Identification of a repeated sequence in the genome of the sea urchin which is transcribed by RNA polymerase III and contains the features of a retroposon. Nucleic Acids Res. 16 (4): 1431-1452
Rogers, J. (1985). The origin and evolution of retroposons. Int. Rev. Cytol. 93: 187-279