@article {MR1718164,
    AUTHOR = {G{\"o}pfert, A. and Tammer, Chr. and Z{\u{a}}linescu, C.},
     TITLE = {A new minimal point theorem in product spaces},
   JOURNAL = {Z. Anal. Anwendungen},
  FJOURNAL = {Zeitschrift f\"ur Analysis und ihre Anwendungen. Journal for
              Analysis and its Applications},
    VOLUME = {18},
      YEAR = {1999},
    NUMBER = {3},
     PAGES = {767--770},
      ISSN = {0232-2064},
   MRCLASS = {49J53 (46N10)},
  MRNUMBER = {MR1718164 (2001c:49032)},
MRREVIEWER = {A. B. N{\'e}meth},
}