Taniguchi, T., Nagai, T., Shimoda, S., Cangelosi, A., Demiris, Y., Matsuo, Y., Doya, K., Ogata, T., Jamone, L., Nagai, Y., Uğur, E., Mochihashi, D., Unno, Y., Okanoya, K., Hashimoto, T., "Special Issue on Symbol Emergence in Robotics and Cognitive Systems (II)", Advanced Robotics, 36, 5-6, 217-218, 2022.