@misc{SimeonovPieronkiewicz,
  author    = {Simeonov, Emil and Pieronkiewicz, Barbara},
  title     = {The Global Math Project},
  subject      = {Mathematics},
  language  = {en}
}
@misc{Simeonov,
  author    = {Simeonov, Emil},
  title     = {Is Mathematics an Issue of General Education?},
  subject      = {Mathematics},
  language  = {en}
}