Joseph S. Miller. Every 2-random real is Kolmogorov random. Journal of Symbolic Logic, 69(3):907-913, 2004. [doi]
@article{Miller04a, title = {Every 2-random real is Kolmogorov random}, author = {Joseph S. Miller}, year = {2004}, url = {http://projecteuclid.org/euclid.jsl/1096901774}, researchr = {https://researchr.org/publication/Miller04a}, cites = {0}, citedby = {0}, journal = {Journal of Symbolic Logic}, volume = {69}, number = {3}, pages = {907-913}, }