Negative K-theory of Derived Categories, by Marco Schlichting: http://www.math.uiuc.edu/K-theory/0636
arXiv: Experimental full text search
KT (K-theory), AG (Algebraic geometry)?, CT (Category theory)?
Weibel: Negative K-theory of varieties with isolated singularities.
Cyclic homology, cdh-cohomology and negative K-theory , by Guillermo Cortinas , Christian Haesemeyer , Marco Schlichting , and Charles A. Weibel: http://www.math.uiuc.edu/K-theory/0722
nLab page on Negative K-theory