P. Heller

Technological performance of water supply and sanitation services in four municipalities in Minas Gerais, Brazil: a comparative analysis

L. Heller, M. Sperling, P. Heller, 2009 .

Long-term uncertainties and potential risks to urban waters in Belo Horizonte

Márcio Baptista, Nilo Nascimento, Léo Heller, 2006 .