The Social Development paradigm is discussed in this article about gatekeeping in Bulgaria but is equally relevant to countries with an Anglo-American child protection system
Bilson A. and Larkins C (2013) “Providing Alternatives to Infant Institutionalisation in Bulgaria: Can Gatekeeping Benefit from a Social Development Orientation?” Children and Youth Services Review  35 (9). pp. 1566­-1575 Download here
It is also briefly discussed in this web resource on the PFAN site https://www.pfan.uk/we-cant-afford-child-protection/