+ links

http://www.ciencia-ahora.cl/Revista22/01Aromaterapia.pdf
http://redalyc.uaemex.mx/pdf/856/85650406.pdf
http://books.google.com/books?id=Xxf6gI6tn-8C&printsec=frontcover&dq=inauthor:%22Mar%C3%ADa+del+Carmen+G%C3%B3mez+G%C3%B3mez%22&hl=es&ei=pz-5TpTTGJKgtweD-v21Bw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CDAQ6AEwAA#v=onepage&q&f=false