Stájer Géza;  Csende Ferenc;  Bernáth Gábor;  Sohár Pál: Preparation and steric structure of tricyclic and tetracyclic saturated or partially saturated 1,3-heterocycles containing a saturated isoindolone moiety.
  HETEROCYCLES, 37 (2).  pp. 883-890.  ISSN 0385-5414 (1994)