Chapters by Dr. Donika Valcheva

• Book Chapter Methods and Tools for Increasing the Effectiveness of E-Learning
  by Donika Valcheva and Margarita Todorova in the book "Methodologies, Tools and New Developments for E-Learning" edited by Elvis Pontes, Anderson Silva, Adilson Guelfi and Sérgio Takeo Kofuji, ISBN 978-953-51-0029-4, InTech, February 2, 2012