Renyang Liu 0001 Jinhong Zhang Kwok-Yan Lam Jun Zhao 0007 Wei Zhou 0011 SCME: A Self-contrastive Method for Data-Free and Query-Limited Model Extraction Attack. 370-382 2023 ICONIP (5) https://doi.org/10.1007/978-981-99-8073-4_29 conf/iconip/2023-5 db/conf/iconip/iconip2023-5.html#LiuZLZZ23