Robert W. Floyd, Ronald L. Rivest. The Algorithm SELECT - for Finding the ith Smallest of n Elements [M1] (Algorithm 489). Communications of the ACM, 18(3):173, 1975.
@article{FloydR75a, title = {The Algorithm SELECT - for Finding the ith Smallest of n Elements [M1] (Algorithm 489)}, author = {Robert W. Floyd and Ronald L. Rivest}, year = {1975}, researchr = {https://researchr.org/publication/FloydR75a}, cites = {0}, citedby = {0}, journal = {Communications of the ACM}, volume = {18}, number = {3}, pages = {173}, }