Jörg Endrullis, Dimitri Hendriks, Jan Willem Klop. Degrees of Streams. Integers, 11B, 2011. [doi]
@article{EndrullisHK11, title = {Degrees of Streams}, author = {Jörg Endrullis and Dimitri Hendriks and Jan Willem Klop}, year = {2011}, url = {http://math.colgate.edu/~integers/a6num/a6num.Abstract.html}, researchr = {https://researchr.org/publication/EndrullisHK11}, cites = {0}, citedby = {0}, journal = {Integers}, volume = {11B}, }