Journal article (2009) - P Hofmann (author), K.D. Panopoulos (author), Purushothaman Vellayani Purushothaman Vellayani (author), PV Aravind (author), Aravind Purushothaman Aravind (author), Purushothaman Vellayani Aravind (author), P. V. Purushothaman Vellayani (author), PV Purushothaman Vellayani (author), P.V. Vellayani (author), P.V. Aravind (author), Purushothaman Vellayani Vellayani (author), Aravind Aravind (author), A. Purushothaman Vellayani (author), PV Vellayani (author), P.V. Purushothaman Vellayani (author), Aravind Purushothaman Vellayani (author), Purushothaman V. Vellayani (author), Aravind Purushothaman Purushothaman Vellayani (author), Aravind Vellayani (author), A. Vellayani (author), P. V. Aravind (author), A. Aravind (author), P. V. Vellayani (author), Purushothaman V. Purushothaman Vellayani (author), Aravind Purushothaman Vellayani (author), Purushothaman V. Aravind (author), M. Siedlecki (author), A. Schweiger (author), J. Karl (author), JP Ouweltjes (author), E. Karakas (author)