=head1 RETURN VALUES
BN_mod_inverse() returns the B<BIGNUM> containing the inverse, and
-NULL on error. The error codes can be obtained by ERR_get_error(3).
+NULL on error. The error codes can be obtained by L<ERR_get_error(3)|ERR_get_error(3)>.
=head1 SEE ALSO
-bn(3), err(3), BN_add(3)
+L<bn(3)|bn(3)>, L<err(3)|err(3)>, L<BN_add(3)|BN_add(3)>
=head1 HISTORY