@article{JEDP_1999____A8_0,
     author = {Noll, Andr\'e},
     title = {Domain perturbations, capacity and shift of eigenvalues},
     journal = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {8},
     pages = {1--10},
     publisher = {Universit\'e de Nantes},
     year = {1999},
     mrnumber = {2000h:47023},
     zbl = {01810581},
     language = {en},
     url = {http://www.numdam.org/item/JEDP_1999____A8_0/}
}