Practical aspects of Boersch phase contrast electron microscopy of biological specimens.
by Andreas, Walter
Walter, A., Muzik, H., Vieker, H., Turchanin, A., Beyer, A., Gölzhäuser, A., Lacher, M., Steltenkamp, S., Schmitz, S., Holik, P., Kühlbrandt, W., Rhinow, D., Ultramicroscopy, 116:62-72 (2012)