@Article{Grue91d,
  author       = {M. Nielsen and K. Grue and F. Lecouat},
  year         = {1991},
  title        = {Expert {O}perator's {A}ssociate: {A} knowledge-based system
                  for spacecraft control},
  journal      = {Telematics and Informatics},
  volume       = {8},
  number       = {4},
  pages        = {425--437}
}