Several of the members of the Guitar Consortium have been involved in the WoodMusICK COST Action FP1302, a 4-year European initiative that finished this year. WoodMusICK aimed to promote knowledge and interdisciplinary dialogue on the study and preservation of wooden musical instruments, bringing together specialists from diverse fields, such as organologists, musicologists, wood scientists, museum curators, conervators, musical instrument makers, acousticians, etc.
WoodMusICK has published proceedings of their conferences, usually containing extended abstracts of each paper, in Open Access booklets, which are available for free downloading here.
WoodMusICK also published a special issue (Wooden Musical Instruments Special Issue) in the Journal of Cultural Heritage, which includes a couple of articles relating to the guitar or other plucked instruments (this is not in Open Access).