I know this is an old question, however, it is useful to mention the new features in the latest version.
From Oracle 12c onwards, you could use the new Top-n Row limiting feature. No need to write a subquery, no dependency on ROWNUM.
For example, the below query would return the employees between 4th highest till 7th highest salaries in ascending order:
SQL> SELECT empno, sal
2 FROM emp
3 ORDER BY sal
4 OFFSET 4 ROWS FETCH NEXT 4 ROWS ONLY;
EMPNO SAL
---------- ----------
7654 1250
7934 1300
7844 1500
7499 1600
SQL>