@inbook{KoiAbr15,
  title = "Advances in Independent Component Analysis and Learning Machines",
  author = "V. Koivunen and T. Abrudan",
  year = "2015",
  chapter = "4: Riemannian optimization in complex-valued ICA",
  edition = "1",
  editor = "Ella Bingham and Samuel Kaski and Jorma Laaksonen and Jouko Lampinen",
  month = "Apr.",
  note = "(Eds: Ella Bingham and Samuel Kaski and Jorma Laaksonen and Jouko Lampinen -- In honour of Professor Erkki Oja)",
  pages = "83--94",
  publisher = "Academic Press",
}