w.h. lam, saiful hafizah hj. jaaman and zaidi isa.  (2013).  risk modelling in portfolio optimization.  - aip conference proceeding : international conference on mathematical sciences and statistics (icmss2013).  . 

wei-thong liew, choong-yeun liong, saiful izzuan hussain, and zaidi isa.  (2013).  modeling and forecasting of klci weekly return using wt-ann integrated model.  - aip conference proceedings (20th national symposium on mathematical sciences) / aip publishing.  . 

nora muda, wan rosmanira ismail, faridatulazna ahmad shahabudin, humaida banu samsudin, nur riza mohd suradi, noriza majid, rokiah @ rozita ahmad, azmin sham rambely, nur jumaadzan zaleha mamat et. al.  (2012).  teaching science and mathematics in english steering mastery in english language amongst sciences students in ukm.  - procedia social and behavioral sciences - ukm teaching and learning congress 2011.  . 

noriza majid, saiful hafizah jaaman, maslina darus, roslinda mohd nazar, rokiah@rozita ahmad, nora muda, nur riza mohd suradi, azmin sham rambely, ummul khair salma din, wan rosmanira...et.al..  (2012).  transformation of teaching and learning mathematics in english: are the lecturers ready?.  - procedia social and behavioral sciences - ukm teaching and learning congress 2011.  . 

nur riza mohd suradi, norkisme zainal abidin, wan zawiah wan zin, marina zahari, zalina mohd ali, najib mahmood rafee, rokiah@rozita ahmad, azmin sham rambely, noriza majid, nora muda...et.al..  (2012).  transformation of english language as the language of knowledge in ukm teaching and learning : highlights of students` perspectives.  - procedia social and behavior sciences - ukm teaching and learning congress 2011.  . 

zaidi isa, abdul malek zakaria, mohd ikhwan azlan, mohd salmi md. noorani, noriza majid, hamizun ismail, saiful afizah jaaman, maslina darus, roslinda mohd nazar, ...et al..  (2011).  students` perceptions of the implementation of teaching and learning of science and mathematics in english.  - kongres pengajaran dan pembelajaran ukm, 2010; tanjung keling, melaka.  . 

noriza majid, saiful hafizah jaaman, maslina darus, roslinda mohd nazar, siti norafidah mohd ramli, nur riza mohd suradi, azmin sham rambely, rokiah@rozita ahmad, ummul khair salma din, ... et at..  (2011).  the readiness of mathematics and science lecturers to teach in english from students` perspective.  - kongres pengajaran dan pembelajaran ukm 2010; tanjung keling, melaka (procedia social and behavioral sciences).  . 

wan rosmanira ismail, zainol mustafa, nora muda, norkisme zainal abidin, zaidi isa, abdul malek zakaria, nur riza mohd suradi, nur jumaadzan zaleha mamat, roslinda mohd nazar, zalina mohd ali.  (2011).  students inclination towards english language as medium of instruction in the teaching of science and mathematics.  - kongres pengajaran dan pembelajaran ukm, 2010; tanjung keling, melaka.  .