3 http://hdl.handle.net/10338.dmlcz/144046 3 Errata of the paper “On the $H^{p}$-$L^{q}$ boundedness of some fractional integral operators” http://hdl.handle.net/10338.dmlcz/144065 Errata of the paper “On the $H^{p}$-$L^{q}$ boundedness of some fractional integral operators” Linear recurrence sequences without zeros http://hdl.handle.net/10338.dmlcz/144064 Linear recurrence sequences without zeros On representations of restricted Lie superalgebras http://hdl.handle.net/10338.dmlcz/144063 On representations of restricted Lie superalgebras Edgeless graphs are the only universal fixers http://hdl.handle.net/10338.dmlcz/144062 Edgeless graphs are the only universal fixers