The paper Promise and pitfalls of random projection algorithms for optical processors written by Grigorii V. Fomin, Dmitrii S. Batanov, Egor O. Kimlichenko, Nikita S. Shmyrin, Gleb M. Suetin, Artem V. Chetvertukhin, Andrey A. Grunin, and Andrey A. Fedyanin has been published in Optics Express.