Observational studies of Cepheid amplitudes
نویسندگان
چکیده
منابع مشابه
Interpretation of observational studies.
Correspondence to: Dr Peter Jepsen, Department of Clinical Epidemiology, Aarhus University Hospital, Vennelyst Boulevard 6, 8000 Aarhus C, Denmark; pj@soci. au.dk _________________________ T he aim of this paper is to review the most important methodological strengths and limitations of observational studies of humans, as opposed to experimental studies. The names ‘‘observational’’ and ‘‘experi...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2012
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201117815