Enabling seamless migration of optical metro-urban networks to the multi-band: Unveiling a cutting-edge 6D planning tool for the 6G era - Arpanaei, Farhad; Rivas-moscoso, Jose Manuel; De Francesca, Iván; Hernandez Gutierrez, Jose Alberto; Sanchez Macian Perez, Alfonso Alejandro; Zefreh, Mahdi Ranjbar; Larrabeiti Lopez, David; Fernandez Palacios, Juan Pedro (Journal of Optical Communications and Networking, 2024)