Media type: E-Article Title: INSTANTANEOUS STARBURST OF THE MASSIVE CLUSTERS WESTERLUND 1 AND NGC 3603 YC Contributor: Kudryavtseva, Natalia; Brandner, Wolfgang; Gennaro, Mario; Rochau, Boyke; Stolte, Andrea; Andersen, Morten; Da Rio, Nicola; Henning, Thomas; Tognelli, Emanuele; Hogg, David; Clark, Simon; Waters, Rens imprint: American Astronomical Society, 2012 Published in: The Astrophysical Journal Language: Not determined DOI: 10.1088/2041-8205/750/2/l44 ISSN: 2041-8205; 2041-8213 Keywords: Space and Planetary Science ; Astronomy and Astrophysics Origination: Footnote: Access State: Open Access