A novel hybrid organic – inorganic silsesquioxane and cobalt (ii) tetrasulphophthalocyanine material as an efficient electrochemical sensor for the simultaneous determination of the anti-hypertensive nifedipine and its metabolite - Winiarski, J; Barros, M; Wecker, G; Nagurniak, G; Parreira, R; Affeldt, R; Jost, C (J Mat Chem, 2020)