Walter Kosak

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The morphological findings in three resected specimens of Barrett's ulcer in children are discussed. Nearly identical morphologic changes are found in all cases, even in adults. This pathologic condition is understood as the third or fourth stage of reflux esophagitis. Perforation or even malignant degeneration is described in these cases. Therefore mainly(More)
Studies on the variability of galleries of pine bark beetles (Col., Ipidae) The variability of the galleries of bark beetles haven't been considered enough till now. Examples of anomalies are given and reduced to their causes. The great pine bast beetle,Myelophilus piniperda, builds the mother-gallery under the bark of stumps downwards instead of above.(More)
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