2 http://hdl.handle.net/10338.dmlcz/143314 2 Corrigendum to “Congruences for certain binomial sums” http://hdl.handle.net/10338.dmlcz/143334 Corrigendum to “Congruences for certain binomial sums” Uppers to zero in $R[x]$ and almost principal ideals http://hdl.handle.net/10338.dmlcz/143333 Uppers to zero in $R[x]$ and almost principal ideals Estimates for $k$-Hessian operator and some applications http://hdl.handle.net/10338.dmlcz/143332 Estimates for $k$-Hessian operator and some applications Minimum degree, leaf number and traceability http://hdl.handle.net/10338.dmlcz/143331 Minimum degree, leaf number and traceability