my ($file, $lfile) = $self->print_latex(@_);
my $ps = generate_ps($file);
my ($file, $lfile) = $self->print_latex(@_);
my $ps = generate_ps($file);
my ($file, $lfile) = $self->print_latex(@_);
my $pdf = generate_pdf($file);
my ($file, $lfile) = $self->print_latex(@_);
my $pdf = generate_pdf($file);