On the RZ Draconis Sub-stellar Circumbinary Companions Stability Study   of the Proposed Sub-stellar Circumbinary System
  In this work we revisit the proposed multi-circumbinary system RZ Dra. We find the proposed system to be highly unstable. We attempt to find a best-fit light-travel time model rendering the orbits to follow stable orbits. We found a best-fit solution, but the resulting orbits also exhibit short-term orbital instabilities. We therefore conclude that the observed timing variation must be due to other astrophysical effects causing a change in the binary orbital period. Follow-up observations of this system is encouraged. 
Tobias C. Hinse, Jonathan Horner, Jae Woo Lee, Robert A. Wittenmyer,   Chung-Uk Lee, Jang-Ho Park Jonathan P. Marshall
astro-ph.SR astro-ph.EP