Rolf Armstrong

Recent publications · Crossref

5 total works indexed

1. AN EXAMINATION OF THE DEGTJAREFF METHOD FOR DETERMINING SOIL ORGANIC MATTER, AND A PROPOSED MODIFICATION OF THE CHROMIC ACID TITRATION METHOD

   · 1934 · cited 16,708x

2. Recommendations for Cardiac Chamber Quantification by Echocardiography in Adults: An Update from the American Society of Echocardiography and the European Association of Cardiovascular Imaging

   · 2015 · cited 11,580x

3. The Clavien-Dindo Classification of Surgical Complications

   · 2009 · cited 10,209x

4. Estimating Nonresponse Bias in Mail Surveys

   · 1977 · cited 9,344x

5. Recommendations for Cardiac Chamber Quantification by Echocardiography in Adults: An Update from the American Society of Echocardiography and the European Association of Cardiovascular Imaging

   · 2015 · cited 6,725x

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