Citation: Jokiniemi, Jonna; Per\"aniemi, Sirpa; Veps\"al\"ainen, Jouko J.; Ahlgr\'en, Markku (2008). A structural study of alkaline earth metal complexes of (dichloromethylene)bisphosphonic acid P-morpholinium- and P-pyrrolidinium-P′-methyl esters. CrystEngComm, 10, pp. 1011-.