Henry Edman
Jürgen Woltz
Joachim Fernau
Ethel Portnoy
Carlos Ochsenius
Ileana Mălăncioiu
Erich Duggen
Andrej Zlobec
Simpósio Brasileiro de Pesquisa Operacional (13th 1980 Rio de Janeiro, Brazil)
Miroslav Maksimović
Humberto Muñoz