• 2.4.2 published ._. report
  • 2.4.4 published ._. report
  • 2.4.6 withdrawn ._. report
  • 2.4.8 published ._. report
  • 2.4.10 published ._. report
  • 2.4.12 published ._. report ._, alternate solution under revision
  • 2.4.14 under revision ._. report
  • 2.4.16 published ._. report
  • 2.4.20 published ._. report
  • 2.5.2 published ._. report
  • 2.5.4 published ._. report
  • 2.5.6 published ._. report ._. alternate solution published
  • 2.5.8 published ._. report
  • 2.5.10 under revision ._. report
  • 2.5.12 published ._. report
  • 3.2.2 published ._. report
  • 3.2.4 under revision ._. report
  • 3.2.6 two solutions published ._. report
  • 3.2.8 under revision ._. report ._. alternate solution published
  • 3.2.10 published ._. report
  • 3.2.12 published ._. report
  • 3.2.14 no adequate solution received ._. report
  • 3.2.16 no adequate solution received ._. report
  • 3.2.18 published ._. report
  • 3.2.20 no adequate solution received ._. report
  • 3.2.22 under revision ._. report
  • 3.2.24 no acceptable paper received ._. report
  • 3.2.26 published ._. report

    Last updated Mon 10 May 99