Recent and good quality articles on systems biology
This question is extremely vague, and can't have any real answer without you specifying a question or at least focus. Keep in mind, there is no high-road to research, you will have to dig in and start reading papers to gain understanding of your field. If you want help from others, you should at least take time to list the papers that you have already read and why you liked them to give readers a flavor of your interests.

To start you off, consider this Google Scholar query for systems biology since 2009. If you've read specific older papers that you've liked, for example this popular 2002 minu-survey:

Kitano, H. (2002). Systems biology: a brief overview. Science, 295(5560), 1662-1664.

Then you can learn how the field has advanced since by doing a forward search in Scholar (and restricted to 2009+). Hopefully this will provide you will some ideas so that you can ask a more precise question!