@inbook{ GÓMEZ:103-104,
author = { PEDRO GÓMEZ GUZMÁN } ,
title = { MATHEMATICS EDUCATORS¿ ACTIVITIES AND KNOWLEDGE },
booktitle = { THE PROFESSIONAL EDUCATION AND DEVELOPMENT OF TEACHERS OF MATHEMATICS. THE 15TH ICMI STUDY },
isbn = { 978-0-387-09600-1 },
publisher = { Springer },
pages = { 103 - 104 },
year = { 2009 },
}