Commands used:
  pkfix-helper horac.ps horac.pkfix-helper.ps \
    -f "Fz=cmss*@*" -f "FB=cmbx*@*" -f "Fv=cmsl*@*" -f "FC=cmtex*@*" \
    -f "Fh=line*@*" -f "Fj=cmss*@*" -f "FA=msbm10@*" -f "Fa=cmmi*@*" \
    -f "Ff=msbm*@*" -f "Fm=cmmib*@*" -f "FI=cmr*@*" -f "FE=cmr*@*"
  pkfix horac.pkfix-helper.ps horac.pkfix.ps
  ps2pdf -sPAPERSIZE=a4 horac.pkfix.ps