Hongwei Jiao Haibing Ma Spatial Algorithm for Mixed Integer Generalized Affine Multiplicative Problems. 2026 April 16 209 J. Optim. Theory Appl. 1 https://doi.org/10.1007/s10957-026-02959-7 db/journals/jota/jota209.html#JiaoM26 streams/journals/jota