| Eckel (P. M.) | 2010 | Tortella bambergeri in North America and an evaluation of its taxonomy |
Bulletin of the Buffalo Society of Natural Sciences | 39 | |
| Eckel (P. M.) | 2010 | Tortella bambergeri in north America and an evaluation of it's taxonomy |
Bulletin of the Buffalo Society of Natural Sciences | 39 | |
| Zander (R. H.), Toren (D.) et Eckel (P. M.) | 2007 | Gymnostomum aeruginosum, G. calcareum and G. viridulum (Pottiaceae, Bryopsida) in California |
Journal of Bryology | 29 | |
| Zander (R. H.) et Eckel (P. M.) | 2006 | Bryophyte Flora of North America, Provisional Publication. Gymnostomum |
Bryophyte Flora of North America | | |
| Eckel (P. M.) | 1998 | Re-evaluation of Tortella (Musci, Pottiaceae) in conterminous U.S.A. and Canada with a treatment of the European species Tortella nitida |
Bulletin of the Buffalo Society of Natural Sciences | 36 | |
| Eckel (P. M.) | 1990 | Bryoerythrophyllum ferruginascens (Musci: Pottiaceae) in Eastern North America |
The Bryologist | 93 (2) | |