Citation: Jonna Jokiniemi; Eija Vuokila-Laine; Sirpa Per\"aniemi; Jouko J. Veps\"al\"ainen; Markku Ahlgr\'en (2007). Structural study of metal complexes of bisphosphonate amide ester: copper, magnesium, zinc and cadmium complexes of (dichloromethylene)bisphosphonic acid P-piperidinium-P?-methyl ester. CrystEngComm, 9, pp. 158-.