http://www.mondodigitale.org/risorse/materiali-multimediali/meet-no-neet-problem-solving-problem-solver

http://www.mondodigitale.org/risorse/pubblicare-sul-sito/cittaeducativaromait/meet-no-neet-problem-solving-types-of-problems

http://www.mondodigitale.org/risorse/pubblicare-sul-sito/cittaeducativaromait/meet-no-neet-problem-solving-nop-structure

http://www.mondodigitale.org/risorse/pubblicare-sul-sito/cittaeducativaromait/meet-no-neet-problem-solving-nop-complexity