Motivating domestic energy conservation through comparative, community-based feedback in mobile and social media. - Petromil Petkov; Felix Köbler; Marcus Foth; Helmut Krcmar (C&T, 2011)

Engaging energy saving through motivation-specific social comparison. - Petromil Petkov; Felix Köbler; Marcus Foth; Richard Medland; Helmut Krcmar (CHI Extended Abstracts, 2011)

Motivating Domestic Energy Conservation through Comparative Feedback in Mobile Applications and Social Networking Sites. - Petromil Petkov (Informatiktage, 2011)

Smart Energy Systems. - Oliver Amft; Richard Medland; Marcus Foth; Petromil Petkov; Joana Abreu; Francisco Câmara Pereira; Philip M. Johnson; Robert S. Brewer; James Pierce 001; Eric Paulos (IEEE Pervasive Comput., 2011)

Personalised eco-feedback as a design technique for motivating energy saving behaviour at home. - Petromil Petkov; Suparna Goswami; Felix Köbler; Helmut Krcmar (NordiCHI, 2012)