Klaus Weihrauch. Computational complexity on computable metric spaces. Math. Log. Q., 49(1):3-21, 2003. [doi]
@article{Weihrauch03, title = {Computational complexity on computable metric spaces}, author = {Klaus Weihrauch}, year = {2003}, doi = {10.1002/malq.200310001}, url = {http://dx.doi.org/10.1002/malq.200310001}, researchr = {https://researchr.org/publication/Weihrauch03}, cites = {0}, citedby = {0}, journal = {Math. Log. Q.}, volume = {49}, number = {1}, pages = {3-21}, }