Papers of mine (and others) on simplicial nonpositive curvature
can be found on Tomasz Elsner page on SNPC
Papers of mine (and others) on cohomology of Coxeter groups and buildings
"New Kazhdan groups" ,
Cohomology of buildings and of their automorphism groups ,
Thin buidings, by Jan Dymara,
Weighted $L^2$-cohomology of Coxeter groups,
Cohomology of Coxeter groups with group ring coefficients, by M. Davis ,
Cohomology of Coxeter groups with group ring coefficients: II,
Compactly supported cohomology of buildings,
Boundaries of right-angled hyperbolic buildings, by Jan Dymara and Damian Osajda
Other papers
Elltwo cohomology of hyperplane complements,
BJN,
JKL,