Patel, K. S. and Shukla, A. and Goswami, A. and Chandavanshi, S. K. and Hoffmann, Peter (2001):
A new spectrophotometric method for the determination of total and ferric iron in rain water at the ppb level.
In: Fresenius' Journal of Analytical Chemistry, pp. 530-534, 369, (6), [Online-Edition: http://dx.doi.org/10.1007/s002160000699],
[Article]

Patel, K. S. and Shukla, A. and Agarwal, N. and Hoffmann, Peter (2001):
Visible spectrophotometric determination of tantalum in soil, sediment, minerals, and alloys.
In: Journal of AOAC international, pp. 399-405, 84, [Article]

Patel, K. S. and Shukla, A. and Goswami, A. and Chandavanshi, S. K. and Hoffmann, Peter (2001):
A new spectrophotometric method for the determination of total and ferric ion in rain water at the ppb level.
In: Fresenius' journal of analytical chemistry, pp. 530-534, 369, [Article]

Patel, K. S. and Shukla, A. and Tripathi, A. N. and Hoffmann, Peter (2001):
Heavy Metal Concentrations of Precipitation in East Madhya Pradesh of India.
In: Water, Air, & Soil Pollution, pp. 463-468, 130, (1), [Online-Edition: http://dx.doi.org/10.1023/A:1013857923368],
[Article]